This is a long, long thread, and I read over half of it, anyway.
I didn't see anyone mention one of the things that really makes me lean towards Cabrera, despite the obvious reasons to vote for Trout. This year, the guy volunteered to change positions in order to bring another masher into the team, and in my opinion really worked hard to play decent defense at the position (he was a better 3B now than he was as a younger man, despite not playing there for over 3 years). Of course, Trout didn't have that option, but I feel that in addition to his massive offense, Cabrera's leadership and flexibility were extremely valuable to his team, and give him an edge.
Another thing to consider, for what it's worth, is that all season pitchers plan around facing Cabrera. Trout was an unknown quantity on a team with Albert Pujols. Despite his slow start, I'm sure that for around half a season pitchers were thinking a lot more about facing Pujols than they were Trout.
I usually go with the stats, but I'm willing to go with a "feeling" in certain circumstances. I "feel" that Cabrera is the MVP.