I use a bit of a variety of dies but my primary dies are Redding Competition. I also use the Forster bushing bump neck die, and the Lee neck sizing collet from time to time during the life cycle of the brass. Tough call, I like them all, but if I were starting out new, I would start with the Forster or Lee full length die which basically means a one step case size/neck size/shoulder bump process. You will also need a good seater so either Forster Ultra or Redding Competition. The Lee is good as well. That would be a good start. No matter the die make, in rare cases the bullet ogive doesn't match the seater well and can distort the bullet. This can be correct by the respective die maker. If you want more control over each step in the process and be able to leave out steps to reduce work hardening of the brass, then the Redding Competition.