Thats good to see lots of people selling robotic kits and parts.
geared motors and lfr kit from www.mundanelogic.com looks good. Especially i think lfrkit can be used as a genral purpose experimental platform.
Maybe i would suggest them encoders in the wheels for the feedback.
waiting for www.robonence.com
You may no longler need to spend your time in finding simple geared motors and wheels instead you can move ahead in programming and controlling.