If you are only going to load for a rifle right now, I would just stick with the single stage. There are too many steps for .223/5.56 to do on a progressive press if you are looking to stay on the low side of pricing. I use a single stage for .223, resizing and de-prime then trim off press then re-prime on press. (see what I mean by too many steps to try to do on a progressive) I'm not saying you can't do it on a progressive press, but you will end up spending more than you probably would like. For a single stage press I would stick to RCBS or Hornady. I have a Lee breech lock that I got at the time for a great deal and I didn't have a lot of spare money. Now that I have saved up, I will probably grab a Hornady in the near future.
I reload .223 and 300 Blackout on a progressive press. If cases need trimming, do do that on the fired brass before putting it the press. Done that way, it is
fewer steps than pistol. With pistol you also have a flare die (unless you have a setup to flare the case using the powder feeding die). On my Hornady Lock n Load Auto Progressive press, .223 goes like this:
Stage 1 upstroke decaps and resizes
Stage 1 downstroke primes
Stage 2 upstroke dispenses powder
Stage 3 seats and crimps.
Stages 4 and 5 are unused.
Every cycle of the handle produces a finished round.
The powder measure reliably drops within a tenth of a grain. The resulting ammo has 1 moa or better accuracy.
Piece of cake. I started on a single stage when I was learning and then moved to a progressive. I kept the single stage thinking that I would use it for rifle too. Then I found that rifle was no more difficult than pistol on a progressive and haven't used my single stage press since.
But a single stage press is certainly cheaper than a progressive. And you do have to spend some time getting the progressive adjusted just right. They are designed to crank out a lot of high quality rounds in a short time. And they do it.
If you are a 100 round a month kind of guy, save yourself some money and stick with single stage. I prefer to do 500 to 1000 rounds per sitting with the progressive.