Check out this. This article has all of the 70mm IMAX theatres for US and Canada.

IMAX 70mm if you can, but if there are no theatres in your area that do that then I would go 70mm.

I did a Mission Impossible review thread previously and was using the same template I made, Please refresh. I believe I fixed this now. Sorry about that! One guy doing this by hand

EDIT: Realizing how different instances might update at different times. Will try to be more careful about this in the future. Definitely a learning experience

More reviews coming! updating as quickly as I can