Your choices are as follows:
Lee Pro 1000
RCBS Pro 2000 (auto index or manual)
Hornady Lock-N-Load AP
Dillon 550B (manual index) or 650 (auto-index)
There are pros and cons to each one. Most will say that the Lee is the least desirable of the bunch, but costs the least.
The RCBS is a cast-iron frame, which is good. has a die plate configuration that does not require a separate powder measure per caliber, but I have read complaints about powder spilling with shallow cases. Some love the APS priming system, some don't. I personally think it's a great idea, but haven't used one.
The Hornady is the most flexible, using their die bushing system. I have one. I like it. However I will say that the priming system is its weak spot - you have to keep it clean or it will jam / not feed primers. The powder measure is rock solid. I use the metering inserts so I can change calibers without adjustment. I have no complaints about the die bushing system, and like the flexibility it affords. The indexing function requires some adjustment, but once you get it figured out, it's not a problem.
Dillons are rock solid. They are also the most expensive. They also have the highest cost per caliber change. From what I've read, if you want to change calibers, stay with the 550. If you want huge production on a single caliber, use a 650.
I was going between RCBS and Hornady, and chose Hornady. I think I would have been happy with the RCBS for different reasons, but I'm glad I made my choice. I reload a lot of different calibers, and couldn't afford the caliber changes on the Dillon.
Just my $.02.