(Stars $105+9 turbo) How do you play it here?

[Metnut]

Down to 5 handed, the blinds are at 200/400 ante 25. I'm average stacked with about 2600 on the BB, the Sb had about 1100, UTG has about 2500, mid position has about 1500, and the button is the big stack with a little over 4K.

The hand gets folded to the button (big stack, has about 4100 or so), who raises the mininum up to 800. He has been playing mostly tight, although stealing/raising about once every two orbits. Only real read is that earlier in the tourney he overbet QQ huge preflop. I have A8o in the BB. I don't believe my table image is either loose or tight. I push. Thoughts?