I'd say the 1.20size Stinger would be ideal combo with the BME44. I don't think it would be a waste at all. I've seen some really trick looking Stingers, they are reasonably priced planes as well. Although if your going to go for an ARF the GP Wagstaff is an awesome plane..for about the same money, or even a GP Pitts....but if your idea is for an all around fun and get-with-it plane, that would be basically low maintenance that Stinger120/BME44 combo would be a really fun ticket...and not break the bank either.
The GiantStinger really would be alot of labor for that lil'44 to haul around, although it would fly it decently, it would be challenged in several areas for power. Just my 2cents...I hope you get the 120