Difficult flop play with top pair

[Kyo Souma II]

Partypoker nl25, Villains are both ~35/8.

I've been at the table for about an hour, Villain #1, we'll call him SadSack, has been at the table the whole time in seat 3 and is fairly active postflop, esp. w/ position. I haven't seen him do too much out of line in EP. He has $74.20 Villain #2, we'll call him Spirit Crack Rock or SCR, hasn't shown down anything except a flopped set/turned boat against one of the weaker players. He has $58.75. I have $45.05. He's in the 3 seat. I'm in the 6.

SCR's button, I'm UTG w/ A[img]/images/graemlins/diamond.gif[/img]9[img]/images/graemlins/club.gif[/img] and make it $0.90 to go. Folds to sadsack who makes it $2 flat. SCR cold-calls, blinds fold, and I call for implied odds.

Flop (~$6.20): 7 [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/spade.gif[/img]

I'm pretty happy, as I've flopped top pair top kicker. I lead for $2.00, SadSack calls, and SCR thinks for all of his time, minus about 5 seconds, and makes it $6.50.

What is my play here? I will post results in a few hours.

-kyo

Also, I forgot.. SadSack always types all in caps.