A7 PF NL50

[Rounder101]

Ive been raising a lot PF due to a good run of cards, and some very good spots to 3b.
I probably have a very LAGgy image, so I dont really know if raising here would be profitable, since their calling ranges are wider and also their limp/reraise range is also wider, not to give the fact that they might be limping monsters, but thats not the case.
Oh and I just lost a big pot with an overpair vs a straight flush draw.
Normally I would raise in this spot... just not know if due to my image (like a 28/24) I should still raise it here

Full Tilt No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($51.55)
MP ($27)
CO ($48.95)
Hero ($49.75)
SB ($50.55)
BB ($14.40)

Preflop: Hero is Button with 7[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, MP calls $0.50, CO calls $0.50, Hero??