KQo in BB hates the min-raise

[Bill Smith]

Live tourney, 50/100 blinds.

UTG+1 has t4000 and limps.
SB completes.
Hero has t2300 and checks the BB with K [img]/images/graemlins/spade.gif[/img] Q [img]/images/graemlins/club.gif[/img].

Flop (t300): K [img]/images/graemlins/club.gif[/img] 4 [img]/images/graemlins/spade.gif[/img] 2 [img]/images/graemlins/spade.gif[/img]

SB checks, Hero bets t300, UTG+1 calls, SB folds.

Turn (t900): 2 [img]/images/graemlins/club.gif[/img]

Hero bets t450, UTG+1 raises to t900...

UTG+1 has limped in several times thus far in the tourney, but the only hand he's shown so far was pocket aces he limped in behind 4 limpers on the first hand (he got no action on an A77 flop). I have no other read to go on.

This sort of hand is probably the most troublesome for me in the early-mid rounds of a tournament. Is everyone comfortable pushing in this spot?