My commute is 13 miles each way so I'm not really worried about the range. I live in California.
During the test drive I was only able to touch 90 mph at about 98% SoC, so it didn't really help me understand what happens as charge drops during sustained speeds. My current bike is a kawi concours with a 1400cc engine and I may (or may not) routinely cruise at 100mph+ speeds as the road conditions and traffic allow it.
Because of the test drive I really want to get one. I was amazed at the acceleration and feel of the bike in general. Again, I REALLY want to get one, but one of the things I want to know is if I'll be able to cruise at 90mph for extended periods of time. I know that over 100mph is really not possible though and that's of real concern to me, as silly as it might sound.
Just to check you test rode the SR not the DSR, DS or S, right?
Since you live in California you are lucky. Even luckier if its in the LA area. There is a shop in West Hollywood called Hollywood Electrics on the corner of Willoughby and Fairfax. They have been the #1 Zero dealer in the world since 2009 when they opened. They also focus on racing Zero's and aftermarket upgrades. I can guess 2 things they can do to increase your top speed but I'll bet Harlan and the guys there have a bunch of tricks up their sleeves.
First is to do a 30/130 to 30/98 gear change. This would get you a theoretical top speed of 135 mph, but perhaps more like 115-120 if you are in a full race tuck because of aerodynamic resistance. Or perhaps do a 28/98 gear swap. That would give you 126 mph potential top speed.
The other is to have the RPM limit raised from about 6000 to perhaps 6500. Or whatever you like to get the top speed you want. This would technically void your warranty, but on the IPM motor, one of the biggest concerns that caused the 6000 RPM limit was dislodged magnets from the surface mount rotor design from 2013-2015. So for 2016 it shouldn't be a concern.
Good luck on your new bike! I think you'll find the Concours collecting a lot of dust after you get an SR. I never had a desire to ride my Yamaha YZF-R1 even once after getting my Zero and so finally sold it after it sat for 10 months feeling neglected.
Remember stop in and chat with the guys from Hollywood Electrics. They can do anything you want there. That's what they are known for.