1) You can't get serious gaming with a 5k graphic card. But maybe something to play the not very intensive games at low - med settings.
2)
AFAIK Pentium D930 is for around 10k.
3) Amd 64 3000 Venice : 4500
or 3500 Venice : 5700
Asus A8N E : around 5k - 5.5k, maybe even almost 6k
2 X 512mb ddr 400 transcend (UCCC chips, if not available then Hynix D43 chips) : around 4k
250GB SATA II NCQ SEAGATE for 4200
Or wait for conroe, they will lead to price fall atleat, then may atleast, you might be able to core solo(celeron) in a low budget.