Same here, I would rather figures which have the possibility of flight poses seeming my next two Iron Men are of the Die Cast variety and the possibility of a DC Mark VI in the future is the only way I am picking up that suit (not spending the the prices some are asking for for an older suit with known fade issues, plus I would rather cross my fingers for an accurate "reindeer games" one in terms of weaponry).
Be it 100% plastic or some metal content I will still consider the 45, even if that would number 5 Iron Men in my collection already, the suit is just gorgeous even if I know for a fact if the 46 is in any way similar to the concept art that will make it onto my shelves too.