RE: Which plane to get
The MUS is a toad! It will go fast and couple horribly in KE... it sucks if you really wanna do NICE aerobatics...
The GW E3D is very lightly wing loaded... I incidentally wrote the Model Airplane News review of this plane!
It is 600 square inches and 3.25 pounds. The Hacker A30 is the PERFECT motor for it as well!!
Also a great aerobatic plane is the Andrew Jesky Extra from Fliton... it is not as forgiving as the GW because it is not as lightly wing loaded. There is a build thread on the GW at RCG's.