Maybe you should choose a style first. Radrovers and most of the Yukons are fatbikes. Cross currents are narrow tires. Your riding style is important too. As a senior member on this forum, you might ride a regular bike 10X farther than most non commuter ebikers? Maybe you're not ready to switch to throttle only and want to ride with occasional pedal assist. Then you need a bike that can do that.

Then you get into the feel. Never rode a bike with torque sensors on pedals. They're pretty standard on high end bikes. Starting to appear on lower cost. If I want to pedal harder than the motor delivers power, I can set that up on my bikes. I don't think I want a torque sensor, unless I can retrofit in a sensor for 50 bucks. You should ride some examples and get a demo anyway.

I have converted several beater bikes. It's hard to buy a new donor bike, motor, and battery and have the same quality ride and beat the price on a Juiced or other lower cost model. Ditto for the Yukon and Radrover fat bikes, as fatbike motors cost more.

Still, if you understand how bikes are put together, and can solder/splice wires, conversions can be fun, and not that expensive, if you can forsake some of the goodies on a new bike.. Two of mine are on this page along with others, spanning 250W front hubs to monster bikes.

http://www.bikeforums.net/electric-b...s-here-23.html