Value bet with two pair/trips or block bet with a pair of jacks?

[swedeD]

No good read on villian, but the table is pretty tight.

Party Poker No-Limit Hold'em, $ BB (9 handed) converter

SB ($89.95)
BB ($17.5)
UTG :#A500AF(Villian)/ ($142.05)
UTG+1 ($158.9)
Hero ($275.65)
MP2 ($99.75)
MP3 ($18.05)
CO ($100)
Button ($97.9)

Preflop: Hero is MP1 with Q[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.5.
UTG :#A500AF(Villian)/ calls $1, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $5</font>, <font color="#666666">6 folds</font>, UTG :#A500AF(Villian)/ calls $4.

Flop: ($11.50) J[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Villian checks, <font color="#CC3333">Hero bets $8</font>, <font color="#CC3333">Villian raises to $20</font>, Hero calls $12.

Turn: ($51.50) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villian bets $25</font>, Hero ???