RE: Lee Vrs RCBS
Not sure what you mean by "multi stage reloader". If you mean a progressive press, forget Lee and RCBS and buy a Dillon.
If you mean a turret press, the RCBS will probably last for the rest of your life. The Lee will not, but will load thousands and thousands of rounds before wearing out, given decent care. How much are you planning to load?
Both will get the job done.