Source (Optional) if amplifier is Topping Tp30-
any mass market DVD player - @ 4k
Amplifier
1) Topping TP30 (USD 100) (I own it) - It has a built in USB-DAC. Meaning you can directly connect it with your computer or laptop. I am assuming you have one.
2) Topping Tp20 - It has no USB DAC. It's cheaper than TP30 but then you will have to invest in DVD player
3) Lepai 2020A+ (USD 20) (I own it) - You need to invest in DVD player if you go in for it.
You can get the amplifiers from amazon.com (US) or aliexpress.com (Hongkong). If you get it from aliexpress.com, you will have to pay for only the custom duty around (Rs. 1500 to 2000) (shipping is free)
Speakers
1). Dayton b652 (I own it) - USD 44 from amazon (shipping & custom charges extra)
2). Pyle 3 1/2" (I own it) - USD 34 from amazon (shipping & custom charges extra)
Please go thru the reviews on internet of all the components. They are amazing. And believe me the sound quality makes any audiophile go ga-ga about it.
Kulkarni sir, it will be better if some body can get it for you from the US since there will be no custom duty+shipping charges associated with it.
BTW my room size is 15X16 and I really enjoy listen to the system which costs less than 15K.
If you need more information please let me know.