10 NL - AQs flops TPTK faces 3b shove

[Gospy]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.05/$0.10 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $4.60
BB: $5.15
UTG: $10.15
MP: $11.70
CO: $10.00
Hero (BTN): $10.00

CO posts $0.10
Preflop: Hero is dealt Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (6 Players)
2 folds, <font color="red">CO raises to $0.45</font>, Hero calls $0.45, 2 folds

Flop: ($1.05) 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">CO bets $1.05</font>, <font color="red">Hero raises to $4.20</font>, <font color="red">CO raises all-in to $9.55</font>, Hero ???

This guy was about 45/13. Basically he had major post flop leaks, I guess the best way to categorize it is erratic. Anyway, I figured I had to 3 bet his cbet, but then when he shoves is it a good enough price? Is a call good here?

Just a little note. I can kinda see how I might 3 bet this pf, but I don't see how calling is terrible either. Also, I have been working on my 3 bet sizing and trying to make it a bit larger so any advice on how I should size the flop 3 bet is appreciated.

Thanks guys.