These last couple of weeks I've been assembling a new desktop machine. It's a fairly hefty machine, core i7, Nvidia GTX 470, 12gigs of RAM.
The biggest annoyance right now is that the Nvidia GTX 470 graphics card is not 100% compatible with Linux (Ubunutu specifically). I can get Linux running but the resolution under X is hideous without the Nvidia driver and with the Nvidia driver I get random system freezes.
So for now, I'm living with Windows 7. It's not the most pleasant experience. However combined with VM player I'm able to get some of my Linux development environment goodness.
Hopefully the graphics issue gets resolved before or early in the new year.