LOL I suspect your answer will be "any of the above"
I dont think a 60" plane would show well at a IMac contest, however I do know you could win with one, no problem
Edge - best for low/slow/close in 3d. Awesome harriers.
MXS - loves to be flown fast and aggressive. Tumbles well, and great pitch authority. Yet still does harriers and low/slow really well too. (my personal favorite of the 4)
Laser - best all around, tiny bit smoother than the MXS, slightly better precision flying. Bigger cowl than the MXS and slightly draggier. 3-4 mph slower in the air than the MXS as a result. Or at least a friend of mine has one with the same setup as my MXS and we raced a whole pack out and came to that conclusion. Otherwise the differences between it and the MXS's flight envelope are pretty small.