Still kickin'!... but need a kick in the arse...

Ok, this lil' GF4 has been faithful, and it's even kicking some butt in HL2, but with all of the new games coming out so rapidly, I need something a bit more... so here's my dilemma.
my specs are below, so that's taken care of, but my question is this:
Should I buy a new motherboard/CPU and get a PCI-E 6600GT for about 500 bucks total? Or should I just bite the bullet and get something like and x800 or 6800U in AGP flavor to squeal away on my aging rig?

Weird question? Well, give me some weird answers.

Well, if your CPU is already an equivalent of the 3200+, I think a CPU upgrade is hardly worth the money and effort. Anything faster than that is just too expensive for too little actual improvement in games.

Personally I'd spend it all on a good graphics card, if I were you. Buying, say, a 6800 GT will make a _much_ bigger difference than getting a 6600 GT and a CPU.