A set of 9s - do I keep two players in the pot?

[Scuba Chuck]

Typing from HH

UTG 990
UTG+1 1610
MP1 835
MP2 635
MP3 1025
LP 975
CO 970
Button (hero) 980
SB 990
BB 990

Blinds: (5/10)
Preflop: Hero is dealt 9[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/club.gif[/img]
UTG calls 10, UTG+1 calls, Hero calls, SB raises to 45, BB folds, UTG calls, UTG+1 calls, Hero calls

Flop (t210) K[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img]
SB bets 100, UTG calls 100, Hero calls 100

Turn (t510) 3[img]/images/graemlins/club.gif[/img]
SB bets 250, UTG calls 250, Hero...

<font color="blue"> What's your line of action here?

Option 1: I raise, and I'm most likely going to isolate SB, and lose UTG.

Option 2: I call, and let SB bet into the river, and see if I can extract more chips out of UTG. Thus moving allin on the river rather than the turn.

Reads: UTG is a huge donkey

FWIW, I raised on the turn to 500, SB moved allin, and UTG folded. </font>