Wow there isn't a clear choice for me in week one.
For now, I'll take Tennessee New England, but I have no confidence in this pick.
Thanks for holding this again!
As far as I know, all Core 2 processors and later from intel and everything after the athlon 64 from amd are 64-bit. You should have no problem from your processors.
I'd avoid the Xperia line. From the reviews i've read they tend to be rather slow and SE has a bad history of supporting their phones post launch (their android phones in particular).