Gigabyte GA-EP43-DS3L Intel P43 Motherboard - $95
MSI P45 Neo3-FR Intel P45 Motherboard - $120
Gigabyte GA-EP45-DS3R Intel P45 Motherboard - $135
Asus P5Q Pro Intel P45 Motherboard - $150
DFI Lanparty DK X38-T2R Intel X38 Motherboard - $180
Asus P5E Deluxe Intel X48 Motherboard - $220
Gigabyte GA-X48-DS4 Intel X48 Motherboard - $225
Just to help you out: All of these motherboards have PCI-E 2.0 which may be useful for future GPU upgrades. If you don't need RAID, more than 6 SATA ports and only need semi-decent overclocking, check out the DS3L. If you need 8 SATA ports, RAID, 4 PCI slots, and legacy ports, then get the Neo3-Fr. If you don't need more than 6 SATA ports but want RAID, firewire, a second PCI-E x16 port, a second gigabit port, support for 16GB of RAM, optional eSATA, x8/x8 Crossfire, and high overclocks, then get the DS3R. If you like the DS3R but need 8 SATA ports, want an onboard pre-installed fast booting Linux setup, only need support for 8GB of RAM and don't need a second gigabit port, get the Asus P5Q Pro. If you want Crossfire with full x16/x16 bandwidth, get the Lanparty DK X38. If you have cash to burn and don't give a damn about getting the most value for your money, get the Asus or Gigabyte X48 motherboards. Do note that the Asus website can be slow sometimes.
I have actually been window shopping with those mobos + more but as of now i still havent been able to decide on one