6'7" and 23 stone, which bike?

[Phil Dryden]

Agreed. I'm 6', and the 50" Cube Kathmandu frame is absolutely fine for me. The Bosch CX motor is superb for torque (75Nm) and gives tremendous assistance on hills. Not recommended, though, if you anticipate wanting to do long spells of riding without any motor assistance, as there is some motor drag when riding unassisted. Does not bother me as I tend to keep Eco on, with occasional forays up the assistance range when needed. Given your circumstances, I would guess you will feel the benefit of leaving assistance on. Personally, I don't see the point of having an electric bike, and hauling its 24kg bulk around unassisted, not at 65 with an ICD fitted, but thats personal preference!