I've used RCBS, Redding, Hornady and Forster dies and they have all worked well. IMO, FL sizing dies are the way to go. I started out Neck sizing only for the WSM and eventually you will have to use a body die or FL die once the brass expands too much to chamber. When you do that, you have changed the shape and volume of your case and the cycle starts over again which is contrary to the idea of consistency in your reloading. If you want a neck and body die for the WSM, I've got a set that I'll sell you. Your technique in sizing matters more than which die you use, I've been able to keep neck runout to about .001 +/- .0005 by using Imperial sizing wax (not too much or too little) and working the press SLOWLY.
Seating dies are not all equal. The competition dies are the best, like Redding and Forster. I have been able to get good results with standard seating dies by starting the bullet into the neck, then lowering the ram spinning the bullet 1808 and finishing the seating stroke... once again SLOWLY. I have been able to keep my runout to about .0015 to .002 for the most part. It's also good to use VLD type seating plugs if you are seating long VLD type bullets.
There is enough load info online that I no longer use hardcopy loading manuals. There is no published load data for most of the powder and bullet combinations I use.
Good shooting