2 pair vs. 4 straight min CR on turn

[MarkD]

Opponent is 38/12/1.0 after 170 hands - but I do not have a feel for his post flop play.

Party Poker No-Limit Hold'em, $ BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

MP3 ($80.28)
Hero ($197)
Button ($250.31)
SB ($201)
BB ($144.10)
UTG ($126.30)
UTG+1 ($610.29)
UTG+2 ($273.10)
MP1 ($79)
MP2 ($352.75)

Preflop: Hero is CO with A[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $1.
<font color="#666666">1 fold</font>, UTG+1 calls $2, UTG+2 calls $2, <font color="#666666">3 folds</font>, Hero calls $2, <font color="#666666">1 fold</font>, SB (poster) completes, BB checks.

Flop: ($10) 5[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, UTG+2 checks, <font color="#CC3333">Hero bets $15</font>, SB folds, BB folds, UTG+1 calls $15, UTG+2 folds.

Turn: ($40) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets $30</font>, <font color="#CC3333">UTG+1 raises to $60</font>, Hero ...

Final Pot: $130

[orange]

Fold generally.

[MarkD]

Should I be betting the turn or checking behind and calling a less than pot size bet?