I want Colorado to win for obvious reasons. I am leaning towards Toronto over Montreal simply because I think that it would be great for MLS to have a broader audience (to the extent the Cup actually attracts even a slightly broader audience) see an in-his-prime superstar like the Atomic Ant representing our exciting and improving league.
I kind of want Seattle v Toronto. I think they're the best two teams and that would be the most entertaining MLS Cup matchup. While I will be rooting against Seattle if they advance, I'd rather watch them than Colorado in the final.