Time for a new CPU?

I just received and installed my new MSI 6600GT-VTD128SP vid card to replace my old 128MB MSI Geforce 4 Ti4200 card, but I have a few questions.

My CPU is pretty old, its a P4 2.00GHz, socket 478 (flame at will plz), and after running 3DMark 03 and comparing my scores with the 4200 vs the 6600GT, I think my CPU might be the factor holding me back, since my scores are much lower than on many benchmarking sites.

Here are my 3Dmark 03 scores, both cards aren't overclocked:

1028x768, no AA, no AF
Ti4200: 1433
6600GT: 6974

1028x768, 4xAA, 8xAF
Ti4200: 508
6600GT: 3971

Now even if I did upgrade my CPU, would it really make much of a difference on BF2 and F.E.A.R., which is what I mainly bought the card for? I'm looking for a CPU around the 3.2~3.4 GHz range... I want it to be decent, but I don't want it to be really expensive and produce a ton of heat. Nothing uber-fast here ^^. I might be leaning toward AMD, only if it will be compatible with the rest of my comp though. Any Ideas?

My PC specs for reference:
Lian Li PC-60 case
Enermax 535W PSU
Intel P4 2.0Ghz
Gigabyte GA-8IEX mobo
2x 512MB Kingston PC2100 DDR SDRAM
6x IDE HDDs, ranging in size from 80GB~300GB
crappy DVD/RW drive
128MB MSI 6600GT
Soundblaster live 5.1

the formatting of my posts has been weird lately, so sorry if all the words turn out mashed together with no spaces :/

you have a shitty front-side bus. I bet your bargain bin ram is slowing you down more than your processor.

It's time to learn about how the FSB and ram clockspeed affects performance and what you should be looking for in your next system. Your processor is probably still somewhere on the low end of current, and with decent ram and a motherboard you could most likely overclock it a little bit to extend its usefulness.