http://www.ultrarc.com/katanax/index.html
http://www.ultrarc.com/giles/index.htm
http://www.ultrarc.com/rocknroll/index.html
I know you said kit, but I thought I would put these three ARF's out there from Ultra-RC. I have the Giles with an OS 1.60 and ES Composite tuned pipe and it is an awesome combination / performer.
Ryan