Who are the highest tier characters you think Morrison might write Final Crisis Superman as powerful enough to beat, and how do you gamble Morrison would have Superman beat them?

By average, high, and low depictions: Same question for Loeb's Superman, Casey's Superman, Millar's Red Sun Superman, Schultz's Superman, and Busiek's Superman -- his JLA/Avengers Superman and/or his Superman books/Trinity Superman, if you see a difference between the two.

Finally, who is the most powerful Superman ever depicted by those and other writers, in continuity or out of continuity, since Crisis on Infinite Earths, in your opinion?

Thank you.

_rc