AKs UTG pre flop decision

[aslowjoe]

500 NLHE 150 players 9 postions paid. Ave stack around 25,000. 16 players left.Moved into table about 10 hands ago. I have only 1 hand of VPIP which was the previous hand when I went all in pre flop and was not called. Blinds 800/1600 antes 100. 8 handed. Nobody on the table had over 30,000. BB had about 15,000 sb similar.

I have about 11,000
AKs UTG.
My initial thought was to raise to 5000. After thinking about it I decided all in was better since I was pretty much pot commited anyway. Which was correct?

Where is the breaking point between going all in and raising 5000?

Also I should mention that most of the players were better then I. Lots of top notch pro's who had been bounced from the main event and I am relatively new to MTT poker.