Converted my Giant Fastroad Comax 1 using a 350W front hub. Its not a plug and play conversion since my bike has a bit different geometry that the kit requires(but might easy for your bike). I got it running after a few days. Pedal assist is awesome. 10 deg hill?? Doable! Im even heavier than you. I now go out and bike twice a week instead of once a month and can control my level of workout.
I was going for the mid drive but my bottom bracket needs special adaptors to work, I also thought that being heavier would place more stress on the drive train with the mid drives, so I eventually went with the front hub motor kit.
Im building a second bike and looking at either the Sirrus or the Cannondale quick series.