since an athlon runs at 266 and al these 333 mobos have the ram running at 333, its kinda a waste, but you have better memory bandwidth, i like to have both running at the same, i don't waste my money that way.
i like the nforce motherboards, basically an xbox, but for your computer, nvidia sound(dobely digital 5.1) ethernet, and if you need it, the onboard g2, i would recommed upgrading that though. also, the 128bit ram also helps speed things along, its designed great, and, from the same people who brought you the xbox(besides intel), nvidia strikes again