Overaggressive?

[DasLeben]

I've been working on really stepping up my aggression with high blinds and taking advantage of every +EV opportunity that comes my way, but is this overdoing it? Both the blinds were reasonably tight players whom I'd assume would call with AT+, 55+.

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (7 handed) converter

MP1 (t765)
MP2 (t2205)
CO (t1957)
Hero (t1470)
SB (t435)
BB (t977)
UTG (t191)

Preflop: Hero is Button with 3[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
<font color="#666666">4 folds</font>, <font color="red">Hero raises t1320 (all-in)</font>