Villain is running 26/19/2.8. Not much history, but I've seen him enough that I think he's a regular. He seems a little stationy post-flop, but not for huge sums that I've seen. If he's paying attention he's seen me double up 200bb deep with AA all-in pre vs. AKo (lol) and take a similar line to this with overcards on a low paired board.

Do I miss too much value by checking here? Can I bet/fold x with pot behind?

Full Tilt Poker, $5/$10 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

UTG: $2,000
MP: $1,572
CO: $4,600
BTN: $419
Hero (SB): $3,888.50
BB: $4,078.50

Pre-Flop: 5 6 dealt to Hero (SB)
UTG raises to $35, 3 folds, Hero calls $30, BB folds

Flop: ($80) 5 J 5 (2 Players)
Hero checks, UTG bets $55, Hero raises to $220, UTG calls $165

Turn: ($520) 8 (2 Players)
Hero bets $400, UTG calls $400

River: ($1,320) J (2 Players)
Hero... (~pot eff. behind)