QQ against 22/18, pots getting big, turn line?

[AZplaya]

Villian in this hand is pkt_diamonds. I haven't seen him at $50 until the past week or so but he seems pretty solid. I have him at 22/18. We've both been pretty active, he's 3 bet me a few times, I've 4 bet him twice and he's folded. Given our history I decided to just call pre and play poker.

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

BB: $50
UTG: $120.45
MP: $19.70
CO: $50.20
Hero (BTN): $66.10
SB: $60.85

Pre-Flop: Q[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] dealt to Hero (BTN)
UTG folds, MP calls $0.50, CO folds, <font color="red">Hero raises to $2.25</font>, <font color="red">SB raises to $8</font>, 2 folds, Hero calls $5.75

Flop: ($17) 4[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $14</font>, SB calls $14

Turn: ($45) 9[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, Hero???

the pots getting huuuugggeee and I'm starting to doubt if I have the best hand. Do we play for stacks or check behind. If we check, do we call the inevitable river bet? If we play for stacks, what hand does he play like this that I'm ahead of?