Bad play? or insta push

[TWINUNO]

Party Poker No-Limit Hold'em Tourney, Big Blind is t200 (5 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)
I figured if i push and he came up wit a monster i was screwed.
MP (t1235)
Button (t1120)
Hero (t2235)
BB (t2430)
UTG (t980)

Preflop: Hero is SB with Q/images/graemlins/club.gif, K/images/graemlins/diamond.gif.
<font color="#666666">3 folds</font>, Hero completes, BB checks.

Flop: (t400) A/images/graemlins/spade.gif, 9/images/graemlins/spade.gif, 3/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t350</font>, BB folds.

Final Pot: t750
Also lets say you get a raiser that always minraises at lvl5+ would you tighten or loosen your range? on pushing.

[Sykes]

Raise pf plz.

[astarck]

I push preflop here. Since the BB could reraise a raise I make and I fold what is most-likely the best hand, I push here. The blinds are big enough to where pushing isn't horrible, you gain a fair amount of chips in relation to your stack, you become chip leader, and the small stacks are all very much still in this. Additionally, lastchance is right, the BB folds A LOT of hands here.

Edited numerous times for mistakes.

[lastchance]

I figure if I push, he folds a lot of hands here. I also figure I have huge equity with KQo and folded to me in the SB.

I push here. Really, really easy one too.