Hi, I'm not sure which rear hub motor kit I should by for my bike.

The ones I know of for now:
http://www.goldenmotor.com/
http://www.comcycle-usa.com/
http://ampedbikes.com/

I want a motor with 500W or more (I think), shipping to Sweden, If the motor can handle ~35km/h then I don't really need more speed and prefer more torque instead.
One thing I want, but ain't necessary is a thumb/twist throttle with no electronical display of batteries power.