Those are some nice prices for AMD's line up, and they do reflect their performance.
OP said he's purchasing from PriceUSA ( or something ) which purchases from NewEgg, so you gotta go by US prices.
2600k is $333
2500k is $228 ( best option for gamers )
Honestly, at this point, you really should wait for SB to get fixed AND for BD to get released if you can wait a few months. Intel shot themselves in the foot with that chipset flaw right now.
Who knows, BD may be a better option, and should be out shortly after SB gets the chipset flaw fixed.
BD is expected Q2, but no official release date has been issued.
AMD is cheaper because Intel is a monopoly and thinks they can charge people insane amounts of money.
Buy the 1090t, it's an insane CPU, check my sig, I got mine to 4.6GHz.
EDIT: Yes, the 2500k will be the best for gaming, but lacks 2 cores and doesn't have hyperthreading. Therefore, if your an encoder, it will lack in those areas. Also in 3 years you have a 5% chance of your SATA 3 ports getting slower.