The E3 Peak is using the same motor as the E3 Dash which is a speed pedelec, a 73 Nm mid-drive motor. Something to keep in mind is that there are No motor inhibitors or shift detection on the E3 Peak.
Boost button is $50, according to several of Court's reviews. Definitely down in the noise level of a new ebike purchase. Court explained that it plugs into the display.
According to Izip support, they stuck with the 2015 configuration for 2016. Are you sure your answer is definitively correct? They admit their website is incorrect....