chargers and charging rates

Hello everyone. I've got 2 questions:

1. Which portable level 2 chargers should I consider buying, and which should I avoid?

2. When charging at level 1, you can choose either 8 amps or 12 amps. Can you also choose the amperage when charging at level 2? I'm not asking whether I can buy either a 16 amp charger or a 32 amp charger, because I already know I can. I'm asking whether the level 2 charge rate is adjustable on the Bolt's charging screen like it is on level 1, or whether some chargers will allow you to switch between 16 and 32 amps.

Thanks very much.