Villain is a regular I guess
His stats are 19/16/2 I haven't seen a showdown with him yet this session. I've got 700ish hands on him and haven't really noticed him until today so that should tell you a little bit how he plays.

So whats the plan?

No-Limit Hold'em, $2.00 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

UTG ($37)
MP ($194)
CO ($271.75)
Button ($208)
Hero (SB) ($465.05)
BB ($413.50)

Preflop: Hero is SB with 8, 6
4 folds, Hero raises $5, BB calls $4

Flop: ($12) 4, Q, 3 (2 players)
Hero bets $8, BB calls $8

Turn: ($28) 9 (2 players)
Hero bets $18, BB raises $55, Hero calls $37

River: ($138) 2 (2 players)
Hero checks, BB bets $344.50 (All-In),
Hero?