I don't know anything about the premium series deluxe, but all you need are two dies - a full length sizer and a seater. Indeed, that's all you want. Full length sizing is by far the more popular choice (vs neck sizing), and for good reasons. Do not bother with a neck sizer at all.
For full legnth sizers, there are two schools of thought- bushing or regular (no bushing). If you will not be turning necks, and I don't suggest you do to start, the simplest is to get a normal full length sizer (no bushing). If you think you will turn necks at some point, it might be worth getting a bushing full length sizer.
For seaters, the micrometer top (AKA "competition") seaters are very convenient, and worth the extra money (to me at least). Another thing to consider is a wilson arbor press seater. They're no better than other seaters, but you can take an arbor press to the range and do a final seat as you're working up a load. This will pay for itself in saved rounds during load development in short order (you just seat them all long at home, and then depending on how well they're shooting, you can adjust seating depth as you shoot). Again, the micrometer top is a good thing. The down side is you need to buy an arbor press, but they're not terribly expensive.
Other than that, it's mostly marketing. Get good dies - they last forever. Redding seems to be the most popular among competition shooters, but RCBS makes good stuff as well. I haven't used the other makers' stuff. My go-to these days is a Redding type S (bushing) full length sizer and a micrometer topped wilson (Stainless! some wilsons are not, and they rust. They're still good dies, but it's a pain to keep them from rusting). It's a little more complex than the simplest way you can go, but it sounds like you're pretty mechanically inclined, so it shouldn't be too big a deal. The main difficulty is sorting out what sized bushing to get. otherwise, it's the same. People here can point you in the right direction on bushing sizes when the time comes.
I would not worry about custom dies at all right now, if ever. You can go a long way with good off the shelf dies. Custom dies are for benchrest or weird stuff, and a whole 'nother can of worms.