Issue resolved. Last evening I had a C runtime error that locked Skyrim hard in the middle of playing. But, I TM'd and ended process, reran, loaded last save and everything seemed fine. The three save files I got were all from loads and saves AFTER that crash. Copied all of the files to the new machine and only those three were recognized by the new SK install even though the remaining dozen or so saves were there. So... loaded up SK on the old machine, load, save, load, save, etc., recopied, everything's cool. Pretty weird though considering saves are just data, right?