Rota RB's or Konig Rewinds, size for size? Rewinds are $50 each cheaper............ does it even matter??

Between those two it probably doesn't matter. I know that most Rotas are gravity-cast wheels, and I believe the Konigs are as well. If you want something a little higher quality, look at the VTO Classic 8, which I understand are low-pressure-cast instead. Or you could look at Panasports, which are great wheels, albeit a bit pricey.