small flush vs river blocker

[Allinlife]

Villain is Ken the cow on FTP, a winning reg who plays 24/15ish tag style. not much read/history between us.

comments/feedback on river line?
Full Tilt Poker - No Limit Hold'em Cash Game - $10/$20 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $2,090.50
BB: $5,680.00
UTG: $2,003.50
CO: $2,337.00
Hero (BTN): $1,990.00

Preflop: Hero is dealt 3[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (5 Players)
2 folds, <font color="red">Hero raises to $50.00</font>, SB calls $40.00, BB calls $30.00

Flop: ($150) A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (3 Players)
SB checks, BB checks, <font color="red">Hero bets $100.00</font>, SB calls $100.00, BB folds

Turn: ($350) 2[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $250.00</font>, SB calls $250.00

River: ($850) T[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets $420.00</font>, <font color="red">Hero raises to $840.00</font>, <font color="red">SB raises all-in to $1,690.50</font>, Hero folds
Uncalled bet of $850.50 returned to SB

Pot Size: $2,530.00 ($3 Rake)

[Requin]

I really think you should just shove the river, either he's betting intending to call any raise amount or he's folding to any raise amount. The fold looks good to me.

[iDONKEDyoo]

villain sucks go arrin plz.

[SHcatcher]

Why raise on the river if you'd fold to a reraise? I remember Lederer talking about how foolish it is to put money into the pot on the river with a made hand, if you have position, and have no intention of calling an allin.

[SHcatcher]

That being said, I think he is value-betting the (better) flush on the river. Was it an instant all-in after you raised?

[FiSheYe]

hmm I would consider just calling the river here.. I cannot see him having the straight so if he leads it's basically either a bluff or a stronger hand, out of my mind there aren't many hands giving you value plus by raise/folding you can never rule out a retarded bluff in which case a fold is costly... it hurts just to call the river but I either shove against stations or just call if my opponent is tight but not bluffy.