Interesting hand from a $1/2 cash game at the Venetian.
I've been at the table for a good few hours. Stuart Hopkin was also at the table, but I now have his chips and he's gone to find Cos as standing next to him Stu will feel as though he's up for the day.
Anyway, the play at the table has been pretty poor - so I've fitted in well. Nice friendly table though, and the banter's good. One player who hasn't joined in the banter is a bloke in his mid-40s who's wearing a Full Tilt WSOP 2006 T-shirt and shades. Stu had previously commented on his bet-sizing as he liked to bet 4x the pot on the flop and raise 12xBBs pre-flop. He was obviously a pro.
Anyway, back to the hand in question. I'm sitting with about $600 ($300 buy-in and I have Stu's chips now was well of course). I have

in the BB and decide to raise to $18 with 4 limpers behind me, including Mr WSOP 2006. Two callers, including him.
The flop is a lovely

I lead out for $35 into the pot of about $60. Mr WSOP 2006 calls, the other player folds.
Turn is a slightly unpleasant

- but I lead out again for about $80. He calls pretty quickly.
The river is

- so doesn't really change anything.
But now looking at him, I have a bad feeling about the hand. I decide to check and he bets about $100. It screams that he has the straight, but I decide I have to call as I wouldn't be surprised to see him turn over a big ace here, even though his body language and that bet on the end is telling me he has the straight.
Thoughts? Do you call the river, and what do you put him on?