The thing is that My mobo sucks my pro sucks well, at least for gaming, I have a p4sd-la with a p4 2.8 HT 1MB prescott, PS is a tigger pro 420W dual fan, 512MB ram DDR 400 trascendent I think and now i am running with a Gforce4 MX-440 and I am planing to sell this machine later on to buy a core 2 duo, but now I want to play only games that I have that the Gforce 4 can`t play, is not a money thing is just that I am planing to sell it, so thats why I don`t want to put much money on it.
Frankly, you're doing the smart thing. Been there, done that. I'd go for the Radeon, if it absolutely has to be between those two. But don't rely on my opinion too much, it's just based on a Google result: