[loosbastard]

I think I check behind on the turn...especially against an aggressive player for a few reasons:

1)might get him to fire the river w/ a busted draw
2)we get to showdown for almost the same price as bet/folding the turn
3)in the future he might bluff the river less often after I check behind on the turn...knowing I do it with some good hands as well as bad ones

And IMO...the flop bet is fine. If you really want to show that you mean business...I suppose $20 would be a good even number.