Ultrabook recommendations?

I'm looking for what it says on the tin, basically. I have an Envy 14 right now which I'm pretty happy with, but it's a little heavy and more than a little overpowered for my day-to-day needs. (It's also not in great shape these days and is having some weird issues, like the fan running constantly, occasionally overheating, lagging in Chrome...)

So I think it's time for an upgrade. My main criteria are

  • It has to be light enough for me to carry around in a messenger bag. I walk a lot - 3-4 lbs. would be perfect.
  • The screen should be within an inch or two of 14" and preferably matte.
  • Backlit keyboard! This is a must-have.
  • Preferably an Intel Core processor and 4 GB RAM
  • 500 GB HDD (an SSD cache would be awesome too)
  • Windows 8 (and if it's Hackintosh-capable, I would love it!)
  • $600 or less - the lower, the better, obviously. I'm more than willing to look at used and refurbished options.

I've been looking pretty seriously at the Lenovo U410 (which, tragically, has a glossy screen and no backlit keyboard), but wanted to see your suggestions!