Since you want to stay under $200 then GFX 5900 is way out of your budget. Also I'd stay away from Ti4200 because the other two cards you mentioned, although more expensive are much better options. Anyway, I believe your best option would be Radeon 9500 Pro (if you can find any), otherwise go for Radeon 9600 Pro. They are around your budget and are excellent performers. If you can find both, go for the 9500 Pro as I mentioned above.