Is it critical that the MB take advantage of the ECC RAM? There are a great deal of MB's with the KT333 chipset out there that would/should be your first choice. The Epox offerings seem to be the most popular at the moment, followed by the ones from MSI. You might have to look around to find an Epox within your budget but NewEgg has some
offerings from MSI that should be in your range. With most of these, you can get USB2 and you will have the ability to increase performance by adding faster RAM later on. So, you will get a good "bang for your buck" and upgradeability. Best of both worlds.