What aspects of a given saw are most important to you? While door #1 houses a nice portable jobsite saw, doors #2 and #3 both appear to be full size cast iron contractor saws with belt drive induction motors. The portable Ridgid is certainly capable of good work, but it's advantage lies in it's portability. If you've got the space, a full size saw has more advantages and more potential IMHO. The'll have a larger surface area (especially in front of the blade), more mass and stability, will be much quieter, and will accept many standard add-ons. Both 2 and 3 will benefit from an upgraded aftermarket fence, but both are very expandable for new wings, motor replacement, fence, miter gauge, etc. The guts of that old Emerson made Crafsman (#3) are essentially the same as the new Ridgid contractor saws....the bolts on are the major differences.