Showing a blind steal

[BlackAces]

I'd just gotten to this table about 15 minutes before, so I had a fairly tight image before this hand:

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) converter

UTG+1 (t991)
MP1 (t5000)
MP2 (t5502)
MP3 (t5313)
CO (t8555)
Hero (t5435)
SB (t3888)
BB (t4661)
UTG (t4072)

Preflop: Hero is Button with 9[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/club.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Hero raises to t600</font>, <font color="#666666">1 fold</font>, BB calls t400.

Flop: (t1300) 6[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets t800</font>, BB calls t800.

Turn: (t2900) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: (t2900) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets t800</font>, BB calls t800.

Final Pot: t4500

Villain had AQ, and played this hand pretty bad in general, I thought. (Villain's response in the chat was "lol, wtf".) Is betting more on the river to avoid showing this down worth more than the chips I picked up on the river? In the end, it didn't matter a whole lot as I was moved about 10-15 minutes later, but I'm interested in opinions for future reference.

I pissed someone else off in the same tournament when I tried to steal with 84o from the SB against a smallish stack, he called with Q9s, we both hit a pair on the flop, I bet 2/3 of his stack, he went all-in, and I went on to make a runner-runner full house. I believe I was told that I sucked after that one.