Ornery: I agree on Redding quality, but I have had good stuff from RCBS over the years. The large-die bushing issue is only a factor for those of us who hope to load .577 Snider, .577-450 and some of the big bore African rounds. These die bodies must be larger than those for standard calibers, and if you don't have a bushing that screws out for the larger dies, you are stuck with the limitations of 7/8 X 14 threads.
Sorry to hear about the slop in the RCBS presses you've handled, though. I feel sad about the quality-cutting that seems to crop up more and more in our sport.