I've used all 3. The Forster is my vote for this type of seating die. However, as it is, I have the el cheapo RCBS standard die set in 223, and once I have the seating depth dialed in for this round with the load my rifle likes, I just set it and forget it. The rifle has shot well so far, and I have seen no need for the adjustable die for use on coyotes or prairie dogs. Rifle just shoots this one load, and shoots it well.
I used to have an adjustable seating die for Highpower competition to go between the 80 grain and the 68 grain bullets. Made a note of the setting and could duplicate it easily this way.
HTH.
Stubb