Party 25/50

[Dakine69]

This one had me thinking
1st hour in my first session after a two week hiatus from world series.
utg(pf raiser) unknown 27/11/2 small sample
utg+1 unknown 28/6/1.25 small sample

With position, my plan was to bet/push a safe turn but with the given action I was confused.

Party Poker No-Limit Hold'em, $ BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($6731)
Hero ($4975)
SB ($14885)
BB ($2375)
UTG ($4167)
UTG+1 ($11385)
MP1 ($5247)
MP2 ($4061)

Preflop: Hero is Button with 5[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $25.
<font color="#CC3333">UTG raises to $175</font>, UTG+1 calls $175, <font color="#666666">2 folds</font>, CO calls $175, Hero calls $175, SB (poster) calls $150, <font color="#666666">1 fold</font>.

Flop: ($925) 5[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">UTG bets $550</font>, UTG+1 calls $550, CO folds, Hero calls $550, SB folds.

Turn: ($2575) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">UTG bets $1700</font>, <font color="#CC3333">UTG+1 raises to $4000</font>,

Call/Push or Fold???
Is raising the flop a better line?