Limped pot, lotsa action, nut straight river pairs board50NL

[Sup3rM4N]

Villain is 17/11/1.5 over 320 hands. EP limp makes it look like a set to me.

Shud I have folded PF? Shud I have C/C instead of B/C flop? Shud I have C/R more on turn? Now C/F C/C or B/C river?

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) -

Hero (SB) ($51.80)
BB ($96.50)
UTG ($45.25)
UTG+1 ($22.70)
MP1 ($32)
MP2 ($63.50)
CO ($50)
Button ($53.60)

Preflop: Hero is SB with ,
UTG calls $0.50, 2 folds, MP2 calls $0.50, 2 folds, Hero calls $0.25, BB checks

Flop: ($2) , , (4 players)
Hero bets $1.50, 1 fold, UTG raises to $4.50, 1 fold, Hero calls $3

Turn: ($11) (2 players)
Hero checks, UTG bets $7, Hero raises to $20, UTG calls $13

River: ($51) (2 players)
Villain has $20.xx behind and I have him covered.

[Fnord]

My first thought was shove! But I agree that his hand is absurdly well defined and you probably need to just suck it up and check/fold as sometimes he'll check his non-set hands behind (if he ever has any.)