Definitely the Radeon 8500LE IMHO.
A bit faster gaming card then the GF3 Ti200, better FSAA, better DVD playback, better 2D image quality, better 3D feature set, HydraVision, TV-Out and DVI-Out by default.
The GF3 Ti200 offers somewhat better drivers by comparison, that's about the only advantage to it IMHO.
Both are decently overclockable too if you care for that.