Argument needs settled about a hand...

[BeerNutts]

A friend and I have had this argument about how to play a certain hand, and I wanted to get some responses from you guys:

Here's the situation, 5 players left in tourney. Blinds started at 25/50, now they're at 400/800.

I'm in SB, everyone folds to me: I look down and see:
A[img]/images/graemlins/club.gif[/img]2[img]/images/graemlins/club.gif[/img]

I have about 3600 in chips left, BB has 2400.

What's the proper play here and why?

Thanks, I'll discuss what I did after a few answers.