Flopped set question

[Geng]

.5/$1 no-limit ring at Pacific. Table is full with 10 people.

Hero ($102): 3 off the button so late middle position, 8 [img]/images/graemlins/club.gif[/img], 8 [img]/images/graemlins/heart.gif[/img]

UTG fold, UTG+1 fold, UTG+2 call, UGT+3 fold, Hero calls, Hero + 1(villan $92) calls, cutoff folds, button calls, SB completes, BB checks. 6 see the flop
Flop: 8 [img]/images/graemlins/diamond.gif[/img], T [img]/images/graemlins/heart.gif[/img], 7 [img]/images/graemlins/spade.gif[/img]
Checked around to Hero, hero bets $4 into a $5.70 pot. Villan raises it to $8. Folded around to Hero. Hero raises to $12. Villan pushes all in. Hero???

Villan is new to the table so not much of a read on him yet. Without any raises pre-flop could have just about anything I would think: 78, T8, TT, 77, J9, JQ, 9Q, AT. What do you do and why?

Will post what I did later.

-Geng