How much to bet this river for value?

[Ian J]

Early in a SnG on Stars, my stack is about 1200 in the BB w/ KQs in hearts. 1 limper to me and I check.

Flop: Ts 8h 7s

I check and he bets only the BB (50) into a 150 pot. The turn is the Ace of hearts. Board Ah Ts 8h 7s. I now lead for 100 on a semi-bluff and he raises to 200. I call with my flush and straight draws.

The river is a Jack of diamonds, giving me the rocks. I contemplate a check raise, but I'd be an idiot if he didn't bet. With his stack around 2000 and mine about 1000, I bet 350 into the 625 chip pot. He called and I took it down.

Question: Should I have bet more on the river considering the (albeit small) amount of aggression he's shown up to this point?