The problem with Kyosho is the price of the Zeal upgrades, very high! They are great quality though.
If interested I have a highly upgraded and great flying Nexus 46. It is very fast, I use it mainly for drag racing, and it beats most all 60 size heli's. Email me for info if interested.
You can see pics here:
http://pages.sbcglobal.net/g2driver/_wsn/page3.html
I am selling it cause I have 5 heli's and want to stick to 60 size only.
It's a great flying heli, the full flapping head is aerobatic yet very stable , especially in gusty conditions.
Raj