I'll just say this......The dealers in my area are not as educated on these Specialized Ebikes. It's great to hear that they are in your area. Product knowledge varies drastically by zip code. I sure as he*%% don't goto my local dealer for an education or news on these bikes.
I have had two sets of carbon wheels - it's a must in my opinion. 50MM wide carbon wheels make the tire wider and thus a bigger print and stability. No tire issues. Just use 2.8 Maxxis or the like 120 TPI for heavy dudes (like me) I have beat my wheels bad and they hold up just fine.....