Resurrecting this old thread with an update.
After a year of considering all options, and Aventon being unable to deliver the bike I ordered (a story for another day), I'm pleased to report that I've added a second ebike to the stable.
Rather than buying a factory bike, I decided to build my own. I wanted a light-weight road bike with decent range. Budget was limited to $2K.
I found an outfit that manufactured bike conversion kits who could build a hub-motor to fit within 130mm dropouts. With the kit in hand, I fitted it to a Trek 7.7FX all carbon fiber hybrid.
The bike went from 9.5Kg (21 LBS) to 14.5Kg (32 LBS).
The power system is made up of a 350W motor, and 10AH battery running at 36V. Installation is dead-simple as the PAS is located inside the rear cassette assembly making this a one wire install.
Range can be pushed over 100Km on the low power assist setting.
Link to system provider:
https://www.100g.tech/
Final cost with donor bike came in just below $2K USD.
Except for the oversized water bottle style battery, you would be hard pressed to know this was an ebike at all.