NL50: my cards are face up...a better line for a set OOP?

[Pokerdemic]

Villain is a nit. He has an overpair here 100% of the time. I felt really stupid after this hand. I am thinking the best alternative here is raising the flop and hoping he is willing to go broke with an overpair on this board.

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

BB: $46.95
UTG: $44.75
MP: $49.70
CO: $59.90
BTN: $51.55
Hero (SB): $70.25

Pre-Flop: 4[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/club.gif[/img] dealt to Hero (SB)
UTG folds, <font color="red">MP raises to $2</font>, CO calls $2, BTN folds, Hero calls $1.75, BB calls $1.50

Flop: ($8) 4[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img] (4 Players)
Hero checks, BB checks, <font color="red">MP bets $4.50</font>, CO folds, Hero calls $4.50, BB folds

Turn: ($17) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">MP bets $8.50</font>, <font color="red">Hero raises to $27</font>, MP folds


What else here? raise the flop while he is convinced he has the best hand? flat call turn and then then put out a small value bet on the river?