Help Me Decide on New system

[dionisk]

Hi im looking to get a new system specificly for hl2.

My current system is as follows:
p4 2.4ghz c 800fsb
512mb pc3200 corsair value ram
evga fx 5900se

Now here are my 3 choices:

1. Get a new mobo for the 2.4, 1 gig of new ram, a 6800gt and overclock the 2.4 to 3.0

2. Athlon XP 64 3500+
Some Socket 939 mobo
1gb pc 3200 OCZ REV 2 Gold
6800gt
Sell my current system for $450

3. Get one of the 90nm Athlon 64's, overclock, 6800gt