I had the same problem finding reviews and info - like i mentioned above i just wrote my own review post on my M11H 72 Volt here yesterday. With a photo taken on Monday. In short I love it, Quality is not perfect but these days really none of them are yet. All scooter brands are mass produced in China and they have “rush production” issues. Shipping vibration etc.
As soon as you stated you were interested in that speed/range/voltage and your budget, you really start reducing your choices, down to a Dualtron, Nami, Wolf Warrior, Yume. (maybe the Bluetran lightning but it wont quite do 60mph). Then you can get in some crazy priced scooters that IMO are a little much unless you have money to burn. Yume for the $2500.00 I paid, I have a heavy duty scooter with super long range with normal mixed speed driving, a 60mph top speed, and crazy lighting and design effects.