25NL - bottom set vs nit on wet board

[donkfish]

Villain is an honest tighty (stats below). When he check-raises the turn, my range for him is { JJ, KK, AA, AQs, AQo}. Possibly AsKs and AdJd but I doubt it. He doesn't have 44, because he's a nit so he would have folded it on the flop. I actually want to take AA out of his range as well.

Against { KK+, JJ, AQs, AQo } I have roughly 32% equity.
Add { AsKs and AdJd } I have almost 35% equity - not much difference.

http://www.flopturnriver.com/pokerfo...ll-173396.html

Guess I'm just fishing for opinions on the hand and whether you think the ranges are dead on.

$0.10/$0.25 No Limit Holdem
FullTiltPoker
9 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($30.66)
UTG+1 ($31.83)
MP1 ($22.59)
MP2 ($40.98) 13/4 over 95 hands
MP3 ($25.57)
CO ($25.45)
Hero ($23.55) taggish image
SB ($25.51)
BB ($14.27)

Pre-Flop: ($0.35, 9 players) Hero is BTN
3 folds, MP2 raises to $0.75, 2 folds, Hero calls $0.75, 2 folds

Flop: ($1.85, 2 players)
MP2 checks, Hero bets $1.50, MP2 calls $1.50

Turn: ($4.85, 2 players)
MP2 checks, Hero bets $4.75, MP2 raises to $18, Hero - Good spot to fold bottom set?