"I am going to begin reloading for my 7mm Rem Mag. After my cases are fire formed, I should be able to use a Redding neck die correct? Skip the whole resize for better accuracy?
Not exactly. Neck sizing sometimes produce better accuracy but it's not common with factory rifles. Neck sizing sometimes gives better case life but not by much and maybe not at all. If you really want best case life with least fuss, get a Lee Collet Neck Sizer. And, no matter what you use for the necks, you will surely need a Full Length sizer die as well.
"Also need a bullet seating die. What brands do I need to be looking at? Any help or recomendations will be greatly appreciated."
Honestly, at this point in your loading career, it won't matter; ALL dies are really quite good and it's rare for the much more costly Redding Comp and Forster BR dies to make any visible difference with factory rifles. After you get groups down to maybe a half MOA you MIGHT see a difference with the more expensive dies.
ALL the expensive "micrometer" seating heads do is allow us to make OAL changes in descrete steps a bit more easily. We can do it just as well with any seater but it will take a bit more time while using a dial caliper.
Dies, (and presses) by brand is far over-rated. ( Personal predjuices aside, on average I think we can load the same high quality ammo on any press made today.) For accuracy, and on average, dies come in two tiers; Forster/Redding are tied for first place, everything else is tied in a close wad for second place.
