[Vuron00]

I may be results oriented, but I had a hand almost exactly like this in the same tourney with about 900 left.

Villain was a LAG bordering on maniac and had been open pushing from any postion for 20BB. I had caught him a few hands before in a bluff.

Same situation and betting patterns. Villain had flopped a set of 3's and I payed him off on his river bet after check/check on the turn.

I think a river call on this comes down to reads. With no reads, I'd tend to make the call earlier in the tourney.