Anybody dropping a grand on just the CPU/Ram/Mobo of a personal computer that only needs the power for video games needs their head examined. Dang, give the excess cash burning holes in your pocket to charity or something! Those are the elements that will be completely worthless and outdated in just a year!
Ram used to be worthwhile moving from box to box back in the EDO and early SDRam days, but not since DDR and Rambus, no longer.
Spending money on cases, HDs, sound cards and other elements that you can get a few years out of is one thing, but just to blow bucks so you can have the best for about 36 hours, that is pure geekdom and wasteful. There is a definite 'bump' in price from the high end to the top end. I usually buy the high end just before the major price gap so I can get the power but not loose a fortune in depreciation. I got my XP1700 chip just days after they introduced XP1900. Got the A7V266 mobo just after they released the long awaited A7N, same story.