Since you’re already built up w/ CE-style devices, you might be more comfortable staying with that sort of device. What is your timeline? If you can wait, it might be worth seeing what pops at CES in Jan.
That said, if you decide to go HTPC I really like the HSW NUC but given your existing component stash it might be better to build an ITX with a HSW i3 so it probably makes the most sense to leverage that.
