My admittedly biased opinion is that the standout in those shown is the Vectrix. It's been in production for about a year and has decent performance and range numbers. It's unfortunate that the price remains beyond most people's comfort level, though it has come down since it's release. It's not been without problems, the most recent being a "battery problem", still, overall, it's got solid mechanical and electrical engineering and design in it.
The integration of regen braking control and speed throttle in the right twist grip is a brilliant (and patented) design that has to be experienced to be fully appreciated.
I bought one almost a year ago, and it's been a joy to ride. Having recently gotten it back from the aforementioned battery repair (replacement?), it's once again become my primary transportation vehicle, taking me reliably to and from work for a daily 25 mile (40 km) round-trip commute. Once my Tesla arrives, I'll obviously be riding the Vectrix much less, and it may be better to find a good home for it (no, I won't be giving it away for free!). But, it will have served its purpose, getting me into the mindset of and used to using electrical power for transportation.