i just received my machine (shown below) just last night. you can read all the comparisons that you want (as i did prior to purchasing my cpu), but at the end of the day, it's a damn fine cpu and motherboard that i chose. i didn't have to wait til the next socket/mobo to be released, and all of that for not having to buy registered memory. the computer is absolutely stunning, and what it's able to do in terms of running games is even that much more phenomenal. i'm seeing stuff in the games that i had never before (p4 2.4, geforce 4600ti) and they are running at lightspeeds even at max quality. so, what am i trying to say? i haven't read any real complaints about the nforce 3 150 board, and yes, SIS received some wonderful reviews. at this level of the game (technology), you can't go wrong with any of the boards that are out there, and yes, some are better than others, but most all smoke all p4 3.2 configs at the moment.
good luck with your machine.