I had a good run and built my stack to about 44k (I think I was in 30 biggest stakes at that time ), UTG+1 is donkish (some could say LAGish) and has about 27k, blinds 300/600, no antes.

Preflop: UTG+1 limps, folded to ma and I call with on CO, SB completes, BB checks.

Flop (2400):
Checked to me and I bet 2000, SB and BB folds, Villian calls.
Turn (6400):
Villian checks, I bet 5000, Villian CR to 10k,
I push.

What do you think guys?
UTG+1 was limping lots of hands, and I took some chips from him, once when I rebluffed his lead on a dry flop (I was preflop raiser he called my raise OOP and lead full pot on a dry flop, I raised and he insta-folded). Another time I had TP (ace) with no kicker and I let him bluff flop and turn, and then I made a block bet on the river and he folded. Actually, that's the first time I've seen him to take this line, i.e. check call flop and check-raise turn.

And if I win this hand I would become a chip-leader.

Results:
He floped nut flush with A5s and I failed to suck-out on him.

I am not sure if I could get away from this hand, in the hindsight I think that I probably could get more cautios as this betting pattern was really strange for him and could indicate a monster. Could 2 pairs be a monster for him, though?

Well, I am still a bit undecided.