Both of these dudes are great fighters in their own respect, no reason to deify one and downplay everything the other has done. I think a 3rd jmm fight would actually be a a bigger challenge for pac than mosley, who's on the clear downside of his career.

"Pac has won all fights he had over the 135-lb limit, all of which are against heavier and bigger opponents. In contrast, Marquez only has one showing beyond the lightweight limit and that was a losing, looking like shit against Floyd."

While this is true, has pac fought anyone as great and skilled as marquez at the heavier weights. Let's be honest all of the dudes he beat at the heavier weights were one loss removed from a severe beating(margo,cotto,hatton) or weight drained to hell(odlh).Saying that it's still a great accomplishment, if it wasn't everyone would be doing it, but he has yet to face someone at the bigger weights that's as skilled as marquez. If the fight is fought at 140 and no higher I think we see something similar to the two first matches, which were great fights due to two great warriors.