You can see their listings here: http://www.yougamers.com/hardware/stats/3dmark06/priceandperformance/?mainnavi=true
For lazies:
In summary if you're going for absolute best bang for buck it seems that an 8600 GT and an Athlon 64 X2 3600+ are your best bets based on their benchmarking.
I'm really really looking forward to the 9600 release, I've read a lot of great things about that card and I think you will see the PC gaming market blown wide open if it gets released at a reasonable price. There will be PCs that can play crysis on all high settings for around $500 and I am fairly sure that the 9600 will be the card of choice when Crytek unveils their $600 system the've been telling folks about.