I've never been a big know it all when it comes to building my own systems etc. and have usually bought Dell, etc. I know about parts and such but what I am getting headaches from is deciding on a motherboard/memory combo. I bought a P4 HT 3.0 L2 chip already. I was looking at the Asus "P4C800-E DELUXE" i875P board. Seems to have gotten a lot of raves and such. I really can't find a board without all the onboard audio/video stuff these days eh? I will be using an Audigy ZS Platinum Pro as well as a ATI Radeon 9800 or X800 so I am not worried about onbord video/audio stuff. Trying to decipher the difference between the different Asus versions is mind boggling! I see small things like onboard Lan chip differences but not much else. When it comes to memory...I was looking at the Asus manual online to try and stick with a recommended brand/model they list in there. One thing I don't know about is what's the difference in say, Kingston 512m 3200 DDR chips. The couple model numbers I was checking out both seemed to have the same specs but the price difference was like $35 between them. What should I look for that jacks up the cost like that? Thanks everyone!