2nd Press
I have a RL550B as well. I also have a Forster Co-Ax and it is awesome. I use it with Forster's Bench Rest Bushing Bump Dies. With their floating system, it makes the most accurate and dependable ammo I have every loaded. And I have tried them all.
It is not however, a good utility press. For instance, just yesterday I was pressing some 40S&W case through a Redding GRx die. The Co-Ax would not work for that operation because it has no shell plate holder. But my Redding Big Boss II worked just fine. The Big Boss II does it all. Five stars from me.
Too bad you don't want a RockChucker. I have a RockChucker II sitting in my shop because there is not enough room for it on my bench. I like having multiple presses for the exact reasons you mentioned. I need to build a couple more benches.
Get yourself a Big Boss II.
Cheers,
Wooly