When I'm building machines I get really freaked out about damaging stuff in tight areas, so I don't like to put modern stuff in Mid cases...that's just me. Video cards and your Zalman right make things a tight fit. Gigabyte makes respectable boards, sure, but the X48 chipset isn't really buying you anything over its younger brother, and DFI makes a better X38. You're DEFINITELY going to need a more powerful PSU to handle 4870's in CF...like, 1kW. http://www.anandtech.com/video/showdoc.aspx?i=3341&p=22 Anandtech shows the 4870's in CF take more power consumption than all high-end cards except 9800GX2's in SLI (basically QuadSLI). That's a lot of juice required. Get Corsair's 1kW model, and you won't be sorry.