You need to do a little research...
no a lot of research!
Just posting here or on some other gun forum will get you the same answers. 1. Dillon 550 2. Dillon 650 3. Hornady LnL. And for the low budget folks the Lee Loadmaster or Pro 1000. Once in a while someone will mention an RCBS Pro 2000. It's a popularity thing...with many just following the loudest noise (often the Dillon folks) without first analyzing their personal needs and preferences. What perfectly fits a IPSC competitor, who only loads for his tricked out pistol isn't going to be a good match for someone who wants to load for a couple of pistols and a an AR 15. And what fits that loader won't fit someone who wants to change calibers 4 times a week and 8 times a month. You need to analyze what you do
and what you plan to add to what you do.
Do keep in mind that here you will only get biased opinions (mine as well) because we all want to extol the virtues of our own decisions...which of course were based on our needs not yours.
I spent six months researching when I was in the market for a progressive. I started my search with Lee, once I picked my jaw up off the floor after checking out the prices of complete systems of Dillons, the Hornady and the RCBS. There's quite the price diference between the upper tier presses,(Dillon, RCBS, Hornady) and the Lee progressives. I spent weeks looking through the reviews, videos, tip web sites, and decided I could make them work, but not without more maintenance than I wished for. What you don't pay in money, you pay in TLC time.
Then I looked over Hornady...nice press...fits several types of reloaders, but I wanted one with removable shell plates. So gulp, it meant spending a little more additional cash. Dillon 550...no. Good press, but 4 stations limit what I thought I wanted to do. So the Dillon 650....nice, nearly perfect press, but caliber changes pricey and slow, too many parts to keep clean and synced, less than perfect primer system, and
I would have to buy (for the convenience, I expected in caliber changes) 10 change kits with powder measures! That's when I decided and bought the least popular (because it's the least known about) RCBS Pro 2000. I saved myself a lot of money having to only buy 1 extra powder measure, and not having to buy the most expensive option for Hornady/Dillon folks...a case feeder...because it doesn't have one.
The idea was to buy a bullet feeder someday instead, when I come to think more speed is useful... and can afford it... maybe this Christmas, if Hornady gets their new one stocked by then. I'm really happy with the Pro 2000....especially having the most advanced, safest, and fastest APS primer system. With CCI preloaded APS primers, having to peck a 100 primers into a loading tube is over...and good riddance. Also, it has no parts that can go out of sync. A big plus in my book. It's simple, fast, trouble free, and the only cast iron frame.
Now all that bunch of bias said, one of the others may fit
you best. They're all decent products, but do yourself a favor and don't leave out looking at the RCBS Pro 2000, like so many do. That would not give you the complete picture. And that is your loss. Good Luck.
BTW, you can take the advice of the post ahead of me...but there's two important requirements to stay happy with it: You need to be mechanically savvy. You need to be naturally patient. A close friend went that route...he's savvy, just not patient...at all. He uses a friend that is....me. I get a phone call and go running 1 a month...sometimes twice. I don't mind...we're close! And I thought by buying the RCBS that I wouldn't have to keep tweaking a Lee. Remember lots of TLC!