i would rather raise the river b/c i think that there is a better chance that mp2 pays you off w/ a hand that you beat than that mike overcalls w/ a worse hand that he would've folded to a raise.

also, i don't like the flop check. follow through on your preflop aggression - if you don't like the response you get on the flop (e.g., 2 calls) then you can take your free card on the turn.