Villain is standard TAG, young.

Preflop: EP limps for 5
Lowjack limps for 5
Hero in the HJ makes it 40 with QhTh
Villain flats
everyone folds except the HJ.

FlopQd3c4c:
Check, check, Bet 100 (very quick bet, didn't think very long), Fold, Hero Calls

Turn: 7h
Check, Bet 200 (another quick bet), Hero Calls

River: 8s

Villain tanked for about 45 seconds and ships it for $515.

I folded because he's pretty tight... but it seems pretty polarizing. What can he possibly have? 7c8c. Could easily have any nut flush draw combo. I'm pretty confident he checks down TT or KQ, QJ on the river and possibly AQ.

Looking back I wish I just bet the flop... I could have led out 85 or 90 and then bet 180 on the Turn that would have me some cheddar. On the river it'll be an easier check fold also.

Thanks in advance!