If your case can hold a full size atx board, then the asus P43 p5qL Pro for $86.99 (newegg.com) with free shipping should work fine. If your case is micro atx or you need onboard video, then the P5QL-em for $99.99 would be a good choice.
Thanks for the info. That looks like a great MB and the add-ons are right up my alley. I doubled the RAM because I am a memory freak thinking it is far more important for us non gamers than a powerful CPU.