Flopping 2 Pair On Shaky Board

[-Skeme-]

First hand at table, no reads on main Villain. Original raiser is known to be weak and raises AJo after limpers have already entered the pot. Accidentally posted before the BB got to me. Probably could've folded this preflop, but it's a little too late for that. Stars $.25/$.50 NL. Full table. Button is Seat 7.

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2 Folds.
Hero checks in BB with K[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img].
Seat 4 raises $1.50 to $2.00.
Seat 5 calls $2.00 raise.
3 Folds.
BB calls $2.00 raise.
Hero calls $2.00 raise.

Flop:

9[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/spade.gif[/img]

BB checks.
Hero checks.
Seat 4 bets $2.50.
BB calls $2.50 raise.
Hero check-raises to $7.50 to $10.00.
Seat 4 calls $7.50 raise.
BB calls $7.50 raise.

Turn:

A[img]/images/graemlins/spade.gif[/img]

BB checks.
Hero checks.
Seat 4 bets $4.50.
BB check-minraises $4.50 to $9.00.
Hero ??.
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I was certain there would defenitely be a continuation bet by the original raiser, and if he didn't bet, there was a good chance somebody would. I intended to check-raise to extract the continuation bets and possible calls from other Villains. I expected my check-raise to either dead the action or at least narrow the field. Nurp. Leading out = better line? I prefer the check-raise as it seems like it'd do a better job of knocking out chasers going after the straight. After I got called I decided I should probably slow down..

Anyways, what's Hero's best line on the turn? Thanks.