Interesting. At the least a thicker top for the base is in order on the current design. More power would be nice, but is somewhat pointless without nicer guides (bb rollers) and a taller resaw height. All of this would drive up cost, not sure that is a good thing.
I ended up at about $500 total for the rigid, mdf scraps, casters, Kreg fence, graphite cool blocks, and a couple of Olson blades. If the base saw price went up more than about $50-75 I would just go the Grizzly route. Main reasons I went with the Rigid were price, instant availability, and lifetime warranty.