RE: ARFs?
I can tell you right now that an OMP Edge is much easier to fly then a 4* 40. I've seen many of 4*'s hit the deck as second airplanes. They are slippery little guys that take a good amount of skill to fly.
Now if you were looking for a 3D trainer that has no bad habits, UCANDO 46. However the only advantage is their ability to land with almost no forward speed because they have a nice thick wing and it's long fuse. However you will outgrow it very quickly as it is a very nimble.
I'd go with the UCANDO over the 4* if you want to wait one more aircraft before you get into an OMP. Also you can use the engine from the UCANDO 46 in the OMP.