The first important thing is whether you need to be road-legal. If the bike is going to be used on public roads, it needs to be within the legal limits of 15mph and 200W - if the bike will only be used off-road, you can have a more powerful motor.
With the road-legal motors, the 6022 is the quietest, and has reasonable speed and hill climbing ability. The 1122 has quite a bit more torque for hills, but is a bit noisier.
The non-road-legal motors are faster, but with less torque for hills,