hu 5/10 river decisions vs fsuplayer - deepish

[chuddo]

headsup 5/10 vs fsuplayer.

*edited to add this was only about 15 hands in. i was playing pretty fast and aggressive and he hadn't been as agg as usual*

me (button): $3350
fsu(bb): $2800

dealt: K [img]/images/graemlins/spade.gif[/img]-2 [img]/images/graemlins/spade.gif[/img]

i open to 40. fsu calls

flop: K [img]/images/graemlins/heart.gif[/img] 7 [img]/images/graemlins/club.gif[/img] 2 [img]/images/graemlins/heart.gif[/img] (pot: 80)

fsu checks. i bet 60. fsu calls.

turn: 9 [img]/images/graemlins/club.gif[/img] (pot: 200)

fsu leads 180. i raise to 550 straight. fsu calls.

river: 8 [img]/images/graemlins/heart.gif[/img] (pot: 1300)

fsu checks. i bet 550 (a). fsu checkraises all in for ~1600 more. i...? (b)

a) thoughts on river bet?
b) river action?

comments on other parts appreciated.