ASUS XONAR U1 or CREATIVE SOUNDBLASTER PLAY

I was looking for a usb sound card so that i can cue with onboard sound card and play the whole mix with usb sound card, main aim is that both should be able to work simultaneously.
i.e assign headphone mix to onboard one and final mix to usb one

I am going for the cheap ones , i have come across CREATIVE SOUNDBLASTER PLAY usb and ASUS XONAR U1

Now the thing is that creative has launched its item 4-5 months back, creative worldwide website shows this item but has no trace in creative India, not even in the news and press block. I have contacted Mumbai and chennai dealers, they also don't have any clue about it.

creative shows it's price as 25$ i.e Rs 1000 apprx

but ASUS price is 100$ Rs 4000 apprx

I mean for the premium you get it in ready stock, has a decent headphone amp, and is good looking, but one thing that i am not sure about is the ASIO feature in it,
generally ASIO has the problem that it does not allows any other sound card to run with it in any single software, i.e does not allow any assignment of headphone mix to any other sound card,

i don't know if you can assign if the second card is also ASIO supported,

so i guess people who might be using ASUS Xonar can help me out in this situation.

Also anybody has any info regarding the availibility of CREATIVE SOUNDBLASTER PLAY in INDIA