Check out the RC-690 and the NZXT Tempest at newegg. They are in the same price range as that Ultra Grid and have better cooling.
MB: GA-EP43-DS3L. It has PCI-E 2.0 and FSB 1600 and still under $100.
Edit: if you can afford the extra $35 for the P5Q (newegg prices) go for it, it's worth it IMO. It adds RAID, one more PCI slot, 2 more SATA ports, Firewire, eSATA.