200 nl river decision with straight against good lag

[docnuclear]

I'm 22/19/3 he is a good lag 27/22/3.
Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

Hero (BTN): $194
SB: $225.95
BB: $206.15
UTG: $403.85
MP: $183
CO: $211.50

Pre-Flop: 9[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] dealt to Hero (BTN)
UTG calls $2, MP calls $2, CO folds, Hero calls $2, SB calls $1, BB checks

Flop: ($10) Q[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/heart.gif[/img] (5 Players)
SB checks, BB checks, UTG checks, MP checks, Hero checks

Turn: ($10) J[img]/images/graemlins/heart.gif[/img] (5 Players)
SB checks, <font color="red">BB bets $7</font>, UTG calls $7, MP folds, <font color="red">Hero raises to $29</font>, SB folds, BB calls $22, UTG calls $22

River: ($97) 3[img]/images/graemlins/spade.gif[/img] (3 Players)
BB checks, UTG checks, <font color="red">Hero ??
Do you bet, if so haw much, how do you respond to a check raise ?