Basic preflop question

[B Dids]

Party 5/10 table that's fantastic.

Guy posts in the CO, I have mined stats that tell me he's 25/8 over like 200 hands.

LAG button raises. He's 75/25 over around 100, and has been raising and 3-betting with all kinds of stuff. And taking most to showdown. I haven't got involved with her much so far in the session.

I'm in the SB with ATo. This means I'm likely ahead of a good portion of the button's range.

The BB is loose, 37ish vpip but not very aggro. He's called two cold in spots like this and has defending to steals almost constantly.

SO:

What's my action?