Ok this is a situation I was in earlier today and wasn't sure how to react. I apologize in advance for not having the fancy set-up I see in the other topics, I'm just posting this by memory and don't have any software right now where I could look up the hand and convert it.

Alright I am third to act with AJo and raise four times the big blind. The next to act min-raises and everyone else folds back to me. We both have very large stack sizes but since I was new to the table I had no read on this guy. I decide to call, what this the right decision?

Also say the button or cutoff had called or raised again, how does my play change now that I am operating in the dark?