It really depends on what you want. If you want a fast machine with built in raid, go with Abit KR7a-Raid, if you want great overclockability go with the Epox 8KHa+ or the Soltek SL-75DRV2. If you're trying to save money, go with ECS, or go with Asus or Abit if you have lots of money to throw at the machine.
I am about to get a Soltek SL-75DRV2 cause I just want a quick, stable, good overclocker for a good price tag.. and I just found one for an unbeatable deal at about $86 US. Check out the software included, the reviews on the board(faster than Epox in most overclocks), the simple layout of the board and everything. I was going to go with the Abit KR7a-Raid, but I can save alot of money and get a better cpu now. Plus, there will be better and newer boards out in a couple of months for the new chipsets and cpus. I would hate to slap down alot of $ on a board or cpu and find out that I'm not even close to being up to date in less than 2-3 months.
If you can wait for an upgrade, I would say wait til the Thoroughbred, Barton, or dare I say it the Clawhammer comes out and then spend your bucks on a newer technology(hehe I can't wait any longer cause my old POS is about 2-3 generations behind now).