I was looking forward to the update, but after installing it on a test machine, I feel it's a real step backward from the previous version, besides being buggy. Comments on this forum seem to suggest others are having the same experience.
Right now, I'm using the previous version on my BOXEE machine. I've looked at XBMC, and installed it on the test machine, with the XEEBO skin. So far, I'm having trouble finding how to get some things to work.
If the Boxee team doesn't do something pretty dramatic (which I doubt), I'll probably eventually go to XBMC, but only if I can get it to behave better. Obviously, I'll post my questions about it over on the XBMC forum.
dual core AMD
nVidia graphics card
6TB internal storage