I currently have a TNT2 M64 that performs alright, but I've been thinking about getting a Hercules 3D Prophet II MX for $119 at Fry's Electronics (the only 'quality' card I can afford right now).

Would I notice a significant increase in performance with the Prophet II over this current TNT2 M64? It might be a stupid question, but seeing how I can't overclock this Duron through the multiplier with my MSI K7T Pro, I thought the performance might still be bottlenecked, even through a better card.. Any ideas?