If you want to OC your proc beyond 4Ghz then get EVGA. But if you want to save some money & don't want to OC your Proc beyond 4Ghz then get Gigabyte. It's perfectly fine.
Get OCZ 1800Mhz one.
Lynx does provides warranty though I've not bought anything from them.
Logitech G15 is gaming keyboard not mouse. So reverse your options :
get the G15 KB & Logitech MX518 mouse ( Rs. 1.2 -1.4 K )
Get Palit GTX 275 one.
CM690 has the best air circulation in it's range. So it's more better than gladiator.
But if you don't like CM690 then it's your call what you will opt for.
Get Corsair 750W or Tagan 800W if it's modular.
Buddy it's not smps it should be ups coz I don't think apc makes ups. A 1000VA should suffice your needs. But if you want something extreme then get 1500VA.
BTW, stick with core i7
