cilius' suggestion is good...
but y not an amd combo...cud save u some money that u can splurge later on ram or even a new grafx card!
consider:
1.AMD Phenom II X4 965 3.4GHz B.E. C3 @ 8.9k
2.a.Gigabyte GA-MA785GMT-UD2H @ 5.5k ,or
b.ASUS M4A785TD-V EVO @ 6.5k
3.Corsair TW3X4G-1600C9DHX 4GB Kit @ 6.6k
Total=21K wid gigabyte or 22k wid Asus.
U can save some money if u get G.Skill F3-10600 1333MHz CL9 4GB @ 5.6K....Then it wud cost u exactly 20k.
Intel Core i5 system with P55 chipset cant get u this much value...
see these threads:
Basic Guide Purchase a New System
Hardware price list/spec sheet
Cheers!
And for cabby....u cant go wrong with Cooler Master Centurion 690 @ 4.2k!!!