Yep. I've got Arch (soon to be OpenBSD) on my 2nd-gen x100e and I put in an SSD and upgrade to the A/G/N wifi card. There are some quirks but it's a decent system. I'm ready to move on though. These have heat problems though and everyone I know with an x2XX has worse problems than I do.
Even with the $600 core i5s, it'd be getting the same OS. Hopefully they've switched to the newer Intel wifi cards because the Linux driver on the 5400AGN they were using has problems.