This is the top of my price range but it looks like it will support both SATA and IDE:
http://www.tigerdirect.com/applicati...Tab=2&NoMapp=0
It also has hyperthreading and is a dual core processor Socket 775 which should mean I could upgrade to a Core 2 Duo Extreme later on.
I'm also considering dual channel ram:
http://www.tigerdirect.com/applicati...730&CatId=2261
Thoughts?