QK Late Position w/ 8 xBB

[RIDGE45]

I'm in late position with blinds at 200-400. I have 3400 in chips One Folded to guy on my right, he limps, I go all in CO position with Q [img]/images/graemlins/club.gif[/img] K [img]/images/graemlins/club.gif[/img]. Button goes all in. Original raiser calls (original raiser had less then me, re-raiser had slightly more).

Limper shows 88 button shows AA. Flop comes Q [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/diamond.gif[/img] 4 [img]/images/graemlins/club.gif[/img] turn is 4 [img]/images/graemlins/spade.gif[/img] river is a 7. Aces hold up.

My point here is did I make the correct play in pushing pre-flop with 8 x BB. I figured my only two options where fold and wait for another hand or push. I figure this to to be the best spot b/c I didn't see original limper calling so I figured I have on caller or none.

Thanks guys.