Dump the Sears one on the right, it's a crappy BS with weak trunnions and thin aluminum table and if you miss it, they're very easy to replace for cheap; they're like the B&D motorized screwdrivers you always see at yard sales and about the same quality. But before you do that, check the old one and make sure its works well and complete. Having said that, sentimental value is a hard one and only you can answer that one.
Those old orig. bases are so big, they take up a lot of space so that's also something to consider.
I would cut some wood and make a shelf to use it as some kind of storage in that base. A sheet should fit right inside in those support brackets. A small dry vac would be good living there?