Hurry up you have less that 24 hours to finish your project... after the wedding its too late
Sirnoname is right. You have to consider compatibility and expand ability of your simulator. If you limit it t only DC
motors, you can use only curtain controllers. Then these controllers are only compatible with either Ian's software or x-sim... meaning you have to do hardware changes everytime you wish to switch from car racing for example to flight simulation (not that x-sim cannot do flight simulation as well).
Besides the software compatibility, there are many better option now instead DC
-AC motors with almost same price range as the DC
motors you choose...
-Or even real servomotors now.
See this one: https://www.youtube.com/watch?v=9CMIPu3t7d0
Its a 75v /3A BLDC motor
with integrated servo drive. I control it from my AMC1280USB
motion controller, and it keeps track of the speed and position, and its almost impossible to stop it or alter its speed even in very low RPM speeds. Remember that this is a direct drive, not attached on gearbox!!!!! You can use it directly with no gearbox in Ian's DIY linear actuator for example...