(27) - Push or Call/Push

[Mark L]

PokerStars Tournament, Big Blind is t200 with t25 antes (5 handed) Converter on pregopoker.com

UTG (t3085)
CO (t2375)
Button (t1290)
SB (t5255)
Hero (t1495)

Preflop: Hero is in BB with A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img]
<font color="red">UTG raises to t600</font>, <font color="gray">CO folds</font>, <font color="gray">Button folds</font>, <font color="gray">SB folds</font>

Villain here is slightly loose and aggressive. Not particularly good. Do you just push this here? I'm really starting to doubt that's the best play, but it's kinda been default for so long. Is it better to flat call here, and make some kind of move on the flop (or even c/f if the flop is insanely hideous)?