I flew the Bridi Killer Chaos with an OS61fx my first year of pattern.
It was very competitive in sportsman. (Two 1st's and a 2nd). I
began last year with it flying intermeadiat, and found the power was not suffeciant for the full roll on vertical upline during the stall turn, and it ran out of steam the last quarter of the outside loop from the top. Finished 3rd in the only meet I flew.
I considered putting a 91fx on it, but was advised that in order to score well in any class above sportsman, A REAL pattern plane was necessary, due to the WOW factor. Altough Bob Fortino won the NATS in intermeadiat in 2001 flying a Boxer, I believe there is some truth to the wow factor thing. I have a Focus/Webra 140 about ready for this season.
I also have a few flights on the GP Venus. (ARF 55' wing).
I am really enthusiastic about this plane, as are many, judging by the threads about this plane. Although I put my 61fx on mine, I understand it is very happy with the OS46fx. The only down side is that the bottom is pink, and it did'nt take long for my friends to figure out what rimes with venus....
Summary: Start with an inexpensive plane, get your feet wet, and if you have as much fun as I am, you will be hooked....croz