I can only say what I would do. 1) buy the C 22 and run it with the Levinson amp. The amp is old but it may have years of life left in it and it should have a lot more grunt than your present amp and if the Levinson goes belly up you can get it fixed or buy something else at that time. or 2) sell the MA 252 and buy one of the big solid state integrated Macs with autoformers (MA 7900, MA 8900, etc) or 3) go all in with the C 22 and a new amp with a lot of current like the MC 462. The last two are assuming you would want to stay with McIntosh. Boy, I enjoy spending other peoples' money.
I think the first choice is probably the best. It fixes your current issue and allows for updates down the road.