25NL Flopped Middle Set Line Check

[xxrod17xx]

Full Tilt Poker, $0.10/$0.25 NL Hold'em Cash Game, 8 Players
LegoPoker Hand History Converter
<font color="green"> My second hand at the table but the UTG is a super loose calling station type. I saw one SD with him while I was searching for good games and he slow played a flopped set. Button has pretty aggro stats, but I have no notes and don't recall any hands with him in the past. Stats- Button: 15/10/4 52 hands, UTG: 60/6.4/2.6 43 hands </font>
UTG+1: $28.40
MP1: $21.20
MP2: $15.55
CO: $4.90
BTN: $24.75
Hero (SB): $25
BB: $25
UTG: $65.65

Pre-Flop: 6[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] dealt to Hero (SB)
UTG calls $0.25, UTG+1 folds, MP1 calls $0.25, 3 folds, Hero calls $0.15, <font color="red">BB raises to $1.50</font>, UTG calls $1.25, MP1 folds, Hero calls $1.25

<font color="blue"> I considered a raise, but with such a loose player in the BB I figured I would just see a cheap flop and try and bust blinds. I do assume I will see a lot of raise PF comments, but I chose this line. </font>

Flop: ($4.75) 7[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (3 Players)
Hero checks, <font color="red">BB bets $3</font>, UTG calls $3, <font color="red">Hero raises to?

<font color="blue"> I know I am not folding this hand, if I am up against a straight so be it. What would be an ideal raise size that I could get some value from 2 players/leave myself with money left to bet on the turn. OR is AI the most optimal CR. Also is a CR the best line here? </font>