Have you tried the Prestige MP before? In my experience it's a totally different animal than the Mid. I bought both, played with both for two months, had to sell the MP because it just didn't have the same balance magic, feel (even brassier than the Mid to me) and plow. Serves bombs, yes, but my groundies weren't in the same ballpark as the Mid. The Ace, to me, is by contrast very much in the Prestige Mid ballpark in terms of overall feel, sweet balance, control, plow, etc.
Don't mean to throw a wrench in your plan, just relaying my own experience. Just couldn't make the MP work for me.