To my mind the card is ok for the price - but I am not a gaming expert. This will at least serve as a refresh.
As an aside, what are you upgrading the processor to? - I have the same processor and same amt/type of RAM and run Win2k / 98 / XP (home) and see little difference between my athlon 1333 mhz and my friends xp2200 with the same RAM when using photoshop 6. If you do upgrade, I would be interested in seeing how you view the change.