AFAIK u can get a 7.1 for 10k, but if u insist 5.1, u shud try creative ones. I suggest u try to go to nearby stores like 2 and 3 and take the names of the most expensive ones which are usually the best from creative and note them here
__________________
Seagate 500gb 7200RPM l Corsair 2*1GB Ram 800mhz l XFX 8800 GTS 320MB Xtreme 650/ 1500/ 950 l Asus P5N-eSLI l Core 2 Duo e6750 l Coolermaster Extreme Power 600watts SMPS l Microtek 800VA Ups l