I started on a single stage several years ago when I was more into precision rifles. After several years without a reloading setup, I bought a Dillon 550 to reload 9mm earlier this year. I've made more than 5000 rounds on it so far. It's great being able to do things individually, advance or return the shell plate as needed. If I feel like the primer isn't going in correctly or there are any other problems, I like that it is not auto-indexing. However, if you had someone to teach you or help you set it up correctly and work out all the kinks, I think the bigger the better. A properly tuned 650 would save a lot of time, a 1050 even more so. If you aren't reloading high volume, might not matter. I'll probably make 15-20k rounds of 9mm this year and I'm already wishing I had went bigger.