Do I Bet The River?

[mjm]

2nd Hand of PS SNG $55. Blinds 10/20. Stacks 1.5k

Hero BB Dealt KQo

Folded to CO who calls, Button Folds, SB calls, Hero checks.

3 to Flop (pot 60)

Flop K,Q,5 (Rainbow)

SB bet 100, Hero raise to 200, CO call, SB call.

Turn (Pot 660)

A (completes rainbow)

SB check, Hero 300, CO calls, SB calls.

River (pot 1560) 8.

SB Checks, Hero ??

How do you play the river, and any thoughts on how hero played the hand to this point?

Thanks