I know I'm asking for trouble with this thread, but I'm just trying to get some suggestions for distros I should try for newer hardware. I have installed numerous other distro with a pretty good success rate on older hardware. But now with a few extra bucks to burn for the bleeding edge hardware. Just leave some info on your success or failures that maybe we all can learn from. Thanks..

Any of the mainstream distributions should be fine: Fedora Core, SuSE, Mandriva, Ubuntu, etc. Since it's new hardware, why not try them all and see which you like? They all install in less than 30 minutes on reasonably modern hardware. You can try each for a day or two (including performing maintenance), and see which fits your personal preferences and requirements best. If you've got a fast internet connection, you can download three or four (or more) distributions in a day. Otherwise, there are several places that sell Linux distributions pre-burned cheap.

Hmmm. This is not a matter of distro but kernel =)
I use slackware and I know Hyperthread work.
The point is you'll have to recompile your kernel to make it work.
Most kernels, nowadays, a general enough to make your hardware work, the point is that you'll have to recompile your kernel to take advantage of relly new stuff. This is a kernel matter, not distro's. "But Why?" You might ask. IMHO enabling THAT kernel feature that just 1% of the users are will need is not really general , isn't it?