Joe,
I'm going WAY OUT on a limb here, but I think the overall answer from most, if not all, of the armor guys is going to be the Abrams. However, if I may, my personal favorite is the Israeli Merkava. With the engine in front, instead of the rear, crew survivability is supposed to have been substantially increased, according to some of the literature I read during the build-up of my Academy Merk II. That has been increased with the hatch doors located at the rear of the hull. Accuracy and destructive power, I think, is about equal...the Merk also uses the Rheinmetall barrel.
OK guys, I now have a plastic sheet over my head. You may fling tomatoes when ready....except for Robert (shermanfreak). He's probably going to tell you that the Sherman is still the best thing going. Trouble is, he may be right.... :) :)
Gip Winecoff