my v3-2000 PCI is running at 201 completely stable with only the small stock heatsink. if you have one with infineon ram, it should overclock great. the v3 is still a decent card, but man, i wish i had FSAA, as i play a lot of space flight sims as well as FPS.
if you have any money to spare, i would go get a Radeon LE and flash it to the DDR model. it will offer a lot of neat features you don't currently have, and it will compiment your processor A LOT better. geforce2mx's can also be had for dirt cheap.
--jacob