Guys need help again. Since My Norge 1000 + Sony speakers are connected to my PC, I want to upgrade my sound source i.e get as sound card.
Currently, I have am having a super shoestring budget of 1K. 

hyeah: I know you guys must be laughing but please help me out.
My motherboard is : XFX nForce 630i GeForce 7100. This board has a Realtek ALC888 onboard audio DAC.
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Now I got an offer to buy a second hand (8 months old) Creative  Sound Blaster 5.1 VX at Rs. 400/--
Below is the pic:
Kindly tell me that 2 channel audio is supported in the card or not & will it be an upgrade from the on-board audio? 
Creative audio drivers generally have lots of problem. I use windows 7 64 bit. I went to their website found Win 7 64 bit driver and already downloaded it. 
My last question is: Will buying this card have any dent on sound quality improvement? Will I go for it?
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Here the details from Realtek website : 
REALTEK ALC888
7.1+2 Channel High Definition Audio Codec
 
General Description
The ALC888 series are high-performance 7.1+2 Channel High Definition Audio Codecs providing ten DAC channels that simultaneously support 7.1 sound playback, plus 2 channels of independent stereo sound output (multiple streaming) through the front panel stereo outputs. The series integrates two stereo ADCs that can support a stereo microphone, and feature Acoustic Echo Cancellation (AEC), Beam Forming (BF), and Noise Suppression (NS) technology.
All analog IO are input and output capable, and headphone amplifiers are also integrated at each analog output. All analog IOs can be re-tasked according to users definitions, or automatically switched depending on the connected device type.
Support for 16/20/24-bit S/PDIF input and output offers easy connection of PCs to high-quality consumer electronic products such as digital decoders and speakers. The series incorporates Realtek proprietary converter technology to achieve 97dB dynamic range playback quality and 90dB dynamic range recording quality, and is designed for Windows Vista premium desktop and laptop systems.
The ALC888 series supports host/soft audio from the Intel ICH series chipset, and also from any other HDA compatible audio controller. With EAX/Direct Sound 3D/I3DL2/A3D compatibility, and excellent software utilities like Karaoke mode, environment emulation, software equalizer, HRTF 3D positional audio, and optional Dolby Digital Live, DTS CONNECT, and Dolby Home Theater programs, the ALC888 series provides an excellent home entertainment package and game experience for PC users.
 
Features
Hardware Features
	High-performance DACs with 97dB SNR (A-Weighting), ADCs with 90dB SNR (A- Weighting)
	Meets performance requirements for Microsoft WLP 3.0 Premium desktop and mobile PCs
	Ten DAC channels support 16/20/24-bit PCM format for 7.1 sound playback, plus 2 channels of independent stereo sound output (multiple streaming) through the front panel output
	Two stereo ADCs support 16/20/24-bit PCM format, one for stereo microphone, one for legacy mixer recording
	All DACs supports 44.1k/48k/96k/192kHz sample rate
	All ADCs support 44.1k/48k/96k sample rate
	16/20/24-bit S/PDIF-OUT supports 44.1k/48k/96k/192kHz sample rate
	16/20/24-bit S/PDIF-IN supports 44.1k/48k/96k/192kHz sample rate
	Up to four channels of microphone array input are supported for AEC/BF application
	High-quality analog differential CD input
	Supports external PCBEEP input and built-in digital BEEP generator
	Software selectable 2.5V/3.75V VREFOUT
	Two jack detection pins each designed to detect up to 4 jacks
	Supports legacy analog mixer architecture
	Wide range (80dB ~ +42dB) volume control with 1.5dB resolution of analog to analog mixer gain
	Software selectable boost gain (+10/+20/+30dB) for analog microphone input
	All analog jacks are stereo input and output re-tasking for analog plug & play
	Built-in headphone amplifiers for each re-tasking jack
	Two GPIOs (General Purpose Input and Output) for customized applications
	Supports anti-pop mode when analog power AVDD is on and digital power is off
	Supports digital microphone interface for improved voice quality 48-pin LQFP Green package
Software Features
	Meets Microsoft WHQL/WLP 3.0 audio requirements
	WaveRT-based audio function driver for Windows Vista
	EAX 1.0 & 2.0 compatible
	Direct Sound 3D compatible
	A3D compatible
	I3DL2 compatible
	HRTF 3D Positional Audio
	Emulation of 26 sound environments to enhance gaming experience
	10-Band Software Equalizer
	Voice Cancellation and Key Shifting in Karaoke mode
	Realtek Media Player
	Enhanced Configuration Panel to improve user experience
	Microphone Acoustic Echo Cancellation (AEC), Noise Suppression (NS), and Beam Forming (BF) technology for voice application
	ALC888DD-GR features Dolby Digital Live and DTS CONNECT software (Optional)
	ALC888H-GR features Dolby Home Theater(software feature)
Applications
	Desktop multimedia PCs
	Laptop PCs)
	Information appliances (IA) e.g., set-top box)
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Thanks in advance!!!