RE: Most manuverable fast plane?
Definitely a "ballistic" pattern plane. A few of these are, all excellent:
-Banshee
-Mach 1
- Curare
-Tiporare
But the one I like the most:
Joe Bridi´s Mamma Mia, never kitted though. You can still get the plans, very easy construction. It is ideal for a .90
By the way, in my opinion the most fun you can have in this hobby is precisely with a fast pattern plane.