Is it time to gamble?

[vinyard]

I was planning on pushing this pre-flop (duh) but then the ubiquitous miniraiser came onto the scene. Am I just being a fool by laying this down and not overpushing?

And more to the point, now that I am back down to the 800 chip tables I am finding myself in his situation more often and short of decent sized pairs, AK and AQ have been folding to these miniraises. For the more established, experienced successful poster here I have a question:
What's your play here and why? And if its not an overpush, what is the range of hands you would overpush with?

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (8 handed) converter

UTG+1 (t1000)
MP1 (t2780)
MP2 (t550)
Hero (t725)
Button (t1335)
SB (t375)
BB (t725)
UTG (t510)

Preflop: Hero is CO with J[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises to t200</font>, <font color="#666666">7 folds</font>.

Final Pot: t350