I heard nothing but good things on the magic, but watch out on the MDS engine. It will tun a 10X6 on my trainer all day, and it has impressive high rpm numbers, but this engine just plain sucks. Some are good, and some aren't, just make sure to run about a gallon on it on the bench and in lazy flight, until the engine breaks in, which takes about 1-2 gallons!!
Believe me, this engine is a piece of crap early on, but proves itself later on in its life.
Also, with such a large bore carb, its low end and transition sucks, so use a FOX long reach glow plud with an idle bar. and make sure that this engine is healthy, cuz you don't want it to stall out in the midlle of a torque roll 2 feet off the ground. Believe me, it has happened.