I hope to use hobby motors because they are cheap and powerful for their weight. This model in particular would be something I am considering:
http://www.modelmotors.cz/index.php?...e=14&line=GOLD
The motor would be three phase. I don't have a real need for either 6-step or sinusoidal but low speed control is a concern so sinusoidal would be nice. There would be an encoder on the motor.
I will be running the output through a gearbox and each wheel will be independent. There is a chance I will be using mecanum wheels so precision on the level of servo drivers would be ideal.
There will be enough processing power to do it in software although I'd like to avoid having to write a controller since it seems rather complicated.
The voltage is likely 25.2V but I'm not sure if we will be using lipo or life batteries.
There are a lot of great boards for hobby and rc planes, but none of them can really accomplish what I need.