That's how I felt 2 months back; either stick with the Dell XPS and upgrade from a P4 to a Pentium D, or toss it all and go Conroe. In which I chose the latter, which was the wisest maneuver.
Rumored to support mixed cards as well as more than 2 of them.
Imagine if this comes out then it means that I can maybe Sli my 8800, my 7800, and my 6800 in one computer