Fold bottom set on the turn?

[B-Man]

Party 5-10 NL.

Context--the villain in this hand seems solid... I haven't seen him get out of line, though he accumulated most of his chips before I arrived at the table, and I have never played with him before.

I am interested in advice on my play on the turn, in particular what do do after he comes back over the top. Obviously I thought I had the best hand when I re-raised, but when he comes back, I have to really question whether it is worth putting the rest of my stack in to find out whether I am ahead or way behind. He limped in early position, so I have to seriously consider whether he had a pocket pair (and hit) or maybe even 56s... He also could have AA.

Party Poker No-Limit Hold'em, $10 BB (9 handed) converter

Button ($1392)
SB (fish)/ ($210.25)
BB ($2519)
UTG ($1000)
UTG+1 (villain)/ ($2238.75)
MP1 ($1679)
Hero ($1506)
MP3 ($503)
CO ($1004)

Preflop: Hero is MP2 with 4[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 (villain)/ calls $10, <font color="#666666">1 fold</font>, Hero calls $10, <font color="#666666">3 folds</font>, SB (fish)/ completes, BB checks.

Flop: ($40) 8[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">fish bets $10</font>, BB folds, villain calls $10, Hero calls $10.

Turn: ($70) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">fish bets $30</font>, <font color="#CC3333">villain raises to $75</font>, <font color="#CC3333">Hero raises to $250</font>, fish folds, <font color="#CC3333">villain raises to $2218.75 (All-In)</font>, Hero ???

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