JJ 200 BB deep, reraised pot, 3-handed A-high flop, checkdown

[skibbel]

PokerStars No-Limit Hold'em, $1.00 BB (6 handed)

MP ($177.50)
CO ($25.75)
Button ($28.25)
Hero ($211.10)
BB ($163.05)
UTG ($111.15)

Preflop: Hero is SB with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $4</font>, <font color="#666666">1 fold</font>, Button calls $4, <font color="#CC3333">Hero raises to $19</font>, <font color="#666666">1 fold</font>, MP calls $15, Button calls $15.

Flop: ($58) 7[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP checks, Button checks.

Turn: ($58) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP checks, Button checks.

River: ($58) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP checks, Button checks.

Villian 17/12/1.2/39 100 hands, stacked him earlier, when i 4-bet AKs and pushed a rag flop, he called QQ, i made runnerrunnerflush.
Shorty abc fisch

Checkdown ok? Where to bet?