Hehe, well, just yesterday while working on trap mechanics I again looked back over the propulsion stats and did notice the appeal of wheels in terms of that speed-support balance.
In my opinion their main drawback--that they're the easiest type of propulsion to lose--is pretty serious since you can easily be stopped in your tracks and the whole point of propulsion is to keep you moving. That said, if you don't mind always carrying a lot of spares and shooting up non-combat robots, keeping yourself wheeled up is possible... I prefer something that will either 1) reliably allow me to outrun most pursuers or 2) not fall apart when the shooting starts!