Whereas the real estate industry has the term Location, Location, Location, we have Requirements, Requirements, Requirements.
There is no set solution that works every time, except careful thought and designing. Calculate out the needed requirements of the robot drive train, and check each these against existing solutions and/or building your own, and choose wisely.
// Although as a word of caution, even 56mm Banebots with hardened carrier plates and welded pins for the planetary gears, won't last more than two or three competitions. Now if your team doesn't attend more than this number of competitions per year, you can use the Banebots without problems. But if you attend multiple regionals, or have a busy off-season circuit, you'll most likely end up replacing the Banebots every 2-3 competitions. (Which in the end, can cost more than just buying AndyMark single speeds outright, not to mention the grief and frusteration...)