Looking to your expertise - VGA card recommendation

I'm thinking about upgrading and getting more into gaming than I have been. I don't want to end up with a graphics card that is more than my system can handle.

I currently have:
AMD FX-55 CPU on an
ASUS A8N-SLI Premium Mobo with
2GB memory DDR PC-3200 and a
Western Digital Raptor 74GB HD and an
Antec NeoHE 550w Power supply in an
Antec p180 case

This mobo also has a Silicon Image 3114 RAID controller on which I have a small RAID-5 setup - I run all my programs and Windows XP off the Raptor though, the RAID-5 is just for storage.

Main thing is, I'm just not sure what graphics cards out there aren't even worth considering because of limitations inherent in my current setup. I don't plan on any major upgrades in the near future - the way it is now I'm happy with it.

I've been considering the 8800 GTS but also things like an X1950 XT, 7950 GT as examples - if my system will be a substantial limiting factor for a card like the 8800 GTS, I guess it doesn't make much sense to go there......

For stuff like this, I just don't know enough on my own yet, but I'm learning - I feel priveleged to be able to rely on everybody's expertise here at TG Forumz.

Any advice is appreciated - thanks in advance.

If you can afford a 8800GTS, then go for it. It's an awesome card. Don't worry about "bottlenecks", your system is fine.

what about monitors? I have a dual screen setup right now but it's kind of crazy - one is a Dell 20.1" - 2001FP I think - it's not the newest one. The other monitor is an older (5-6 years old) Sony CRT - Multiscan 420GS - 18" I think - I though it would do better than 1600 x 1200 resolution but I can't seem to find that out right now....

Is a 8800GTS overkill for the monitors that I currently have? I would like to get rid of the old CRT in a way - a flat panel takes up so much less room......

How does that play into what you might suggest?

Thanks again