😉 Forget all of the biased 'get this' talk, Athlon4all pretty much covers it.
😀 Both perform VERY close, well once the GF3TI200 is o/c'ed to within 10% of the GF3TI500 (which is very easy to achieve). The Radeon does have better '2D' image quality, Aniso, TVout and slightly edges it in perf. The GF3TI200 is better at AA though, and also has the GF brand and should sell on more easily after use. Outside the US & Canada Radeons are usually ludicrously priced, so the GF3TI200 is a much better option.
😉 However, at $150 you should be within grasp of the GF4TI4200, 64MB cards are great, but 128MB ones are much more future proofed. 4200 o/c fantasticly, to 4400 levels, that's about 10% away from 4600 perf! 4200 also has excellent '2D' image quality, AA, TVout and obviously perf, esp compared to GF3TI200. The 4200 is the 'best bang for buck' and will age far better than any other card near its class, simply a great buy.