Flopping trips against tight player

[mbman]

I have been raising lots in LP and have won pots with CBs. No showdowns really.

Villain in this hand is very tight, playing 13/10/2.

What is the best line on the turn here?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $35.25
BB: $48.65
UTG: $19.40
MP: $45.10
Hero (CO): $57.00
BTN: $103.30

Preflop: Hero is dealt 7[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/diamond.gif[/img] (6 Players)
2 folds, <font color="red">Hero raises to $1.75</font>, BTN calls $1.75, SB calls $1.50, BB folds

Flop: ($5.75) 7[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $4.00</font>, BTN calls $4.00, SB folds

Turn: ($13.75) 5[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero ??