I am one big lee hater right here. Everything I have ever used of theres has been faulty of piss poor constructiion and not worth the money I paid for it.
That being said if you are wanting to get into loading your own for low cost then Lee is where you should look.
I prefer RCBS and Dillon. Yes I drink the blue koolaid. My dillon is flawless in every way. If there is a problem with it, it is not the press it is the wing nut operator jerkin the handle.
I have loaded on RCBS for just about my whole life. I grew up just 45 miles from the RCBS factory. RCBS products are build Ford tough and will last you a life time and then some. My RCBS uniflow powder measure is on its 3 user and still going strong.
The SDB from dillon is a good press but, it has some glaring drawbacks as well. First it doesn't take standard dies they are special dies only made by dillon. It is small and cramped in the work area if you have big hands and fingers it is going to be a pain in the ares to work with if and when something goes wrong. If I were going to get another dillon it would be the XL-650. The 550 is good and if you are starting out and dead set on a progressive the 550 is a manual index (Meaning you have to rotate the shell plate). So you can use it as a single stage reloader as well. The biggest draw back to Dillons are the prices caliber conversions are $45 and a tool head with powder measure is $100.
Hornady makes a good progressive that works great is built like a dam tank and caliber conversion is much cheaper on it and you can use the same powder measure on everything you just have to change the settings.
There are lots and lots of stuff out there Lee has kits RCBS has kits and Lyman has a kit I think. with the kits you add powder, primer, cases, dies and your ready to load.
First thing I would tell you to do is get two books and read them.
1. ABC's of Reloading. Amazon.com: Abc's Of Reloading: The Definitive Guide For Novice To Expert (9780896896093): Bill
2. Sierra 5th Edition Rifle & Handgun Reloading Manual Amazon.com: Sierra 5th Edition Rifle & Handgun Reloading Manual Md: 0500 .: Sports & Outdoors