I'm
still trying to find a decent ebike kit just for tooling around - not really for serious transportation. Although, the ~10 mile trip to work via bike would be nice. The best deal I've found thus far are the kits found here:
http://www.ampedbikes.com/kits.html
$840 for 750 motor (premounted to reinforced rim/spokes), ESC, 36v 12Ah Li battery, etc is pretty good IMO. 750w should be adequate for decent speed with minimal pedaling, although I was really looking for something in the 1500w range. But finding setups that spec
true wattage can be tough - lots seem to be of the "flame sticker" variety as far as specs go.
There is another site,
http://www.electricrider.com/, that has higher power stuff. The "7240" kit includes a 2880w motor (truly??) running on 72v, 40A ESC, etc for over $1k (minus battery). But the cost is rather high and the only power options they sell are SLA (yuk). Getting equivalent voltage/Ah Lithiums would cost me at least an extra $500, not to mention a charger that will do 18-19s...