[eisanm]

I don't limp A7o utg. It looks ugly to me.

The people with whom I discuss 6max primarily (they play it well at 3-6 and 5-10 mostly) generally recommend to never limp first-in preflop.

Then again I dont think check-calling on the flop is very beautiful. Both these things sound very passive to me. I would fold A7o pf utg and maybe raise it from the button if first in.

Now I'll go on and read the other responses. Interesting topic.