Times have changed, I no longer own or fly Kyosho. I used to like them, but haven't looked back since I sold off the Calibers. The Caliber 5 is heavy for a 50-powered heli, and builds up nose heavy. Somewhere in the Kyosho forum are a few posts of mine with a laundry list of build hints that will make your C5 fly a bit better, and last a bit longer if you decide to go that route.
Somewhere at the height of my Kyosho madness, I bought a Trex 600 Nitro Pro, and it didn't take long before my Kyosho stuff was history. This is most of my current fleet:
The big problem you'll have today is finding good parts support. Heliproz and Chris at RC Heliworks seem to still be keeping the parts supply primed, but they have been about the only places in the states who have had decent parts support over the long haul.
Kyosho seems to be paying less and less attention to their helicopter lineup, having gotten rid of their Caliber 90 flagship. The Caliber 4 was the replacement for the Caliber 30, the 30 actually flew better and it's hard to find a 4 in the states for sale as Kyosho doesn't really import them any more. Lack of demand.
Their electric entries -- EP400, EP400XP have lackluster performance. The EP450V just never seemed to have caught on in the states. Their EP700 is an electrified Caliber 30/4. The Trex 550e runs circles around the 700.
The 50 heli market is awash with really excellent, relatively inexpensive helis, and Kyosho hasn't kept up with the times. If you have an aversion to anything Align, a real sleeper right now is the Thunder Tiger Raptor X50B. Decent price, top shelf performance. Other 50 helis of note would be the Fury 55 and Synergy N5.
Unless Kyosho were to get serious about helis and stay interested for more than a couple of years, I'd not give them a second look now. In my opinion, the Kyosho ship sailed a few years ago.
* Making the World Better -- One Helicopter at a time! *