33 at NL 25: What do I do when he checks?

[Nick C]

So this is possibly a simple question, but it struck me tonight that I don't know the answer. I mean, if he bets, I either call and slowplay for the time being or raise immediately, and I think there's a case to be made for both of those options, and I tend to mix it up. But when he checks, well, maybe there's even a clearer correct answer, but I'm not sure what it is.

Anyway, my opponent is 24/15/1.2 after 82. That's how it is, even at NL25, post-ban [img]/images/graemlins/tongue.gif[/img].

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($27.25)
CO ($44.35)
Hero ($51.15)
SB ($31.20)
BB ($7.40)
UTG ($24.40)

Preflop: Hero is Button with 3[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $1</font>, Hero calls $1, <font color="#666666">2 folds</font>.

Flop: ($2.35) 4[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks . . .

And now Hero does what, and why?