I agree with KSH. I have a couple of 550s and one 1050. Selling one of the 550s to add a second 1050. I don't have a lot of time to reload so like to maximize the time that I do have.
Learning on the 550 is much easier than on the 1050. Simpler to understand and maintain. Once you get that down and start shooting more volume you may want to step up to a higher volume (case feeder, bullet feeder) machine. Then again, maybe not. The 550 will do everything that you need it to do, just not as fast or efficiently as the other two.