Until recently I'd always been happy with Asus or Evga, now I'd say go with eVGA.
I had MAJOR issues with my P6T, and they weren't just my issues but the entire community, and from what I heard those same issues carried over into other mobos as well and took years to fix. (Well, beyond one year).
The issue I had was you could not boot with 12 GB of ram, Windows 7, and 3 PCIe slots used (Could be 2 graphics cards and an X-Fi), the OS wouldn't hang it would just move at glacial speeds, like, 6 hours to boot up. No joke.
You had to use 6gb of ram or take out a graphics card.
An oversight that bad, and it took 8 bios revisions to get it fixed, there were hundreds of threads complaining about it.
Also, Asus website is painfully slow, and often won't load because too many users. They've always lacked bandwidth for years, if you finally do get it to load driver downloads are often below 40kbps.
Lastly Asus warranty is 3 years tops, eVGA has lifetime warranties.
So, I'd say go with eVGA because you get the lifetime warranty, and if you ever do have problems, they Cross-Ship.
So they mail you a new one before you send your old one back (and charge you full price if you don't send it back). XFX has quality boards too, but they do not cross ship.
XFX does however, have what they call a Double Lifetime warranty, which specifically says you can transfer the warranty to someone else if you sell your parts.
Gigabyte is slowly coming up in quality, but they tend to be slow with new driver or bios updates. I suppose another way you could look at it is they don't need them as often.
That's the board I would buy if I didn't already have a 920 that I'm happy with.
That or the Classified version, but I think that's the right price range there.
If you don't already have an i7 920 or something definitely buy a Sandy Bridge series, they are cheaper, and way faster. Edited, Jan 31st 2011 3:54pm by Eadieni