I'll also give an endorsement for Forster FL sizing die and the micrometer seater. One other think you might look into is having the neck of the Forster die custom honed to match your brass dimensions. You can have them open up the neck so that it is about .003-.004 smaller than the neck OD of your brass with a loaded round. This will help reduce how much the brass is being worked when the die sizes it down and then it is expanded back up. I believe their dies are normally .008" smaller than loaded round (at least for the calibers I've asked about when using Lapua brass). You can call and they will give you the specifications. Another plus is that it only costs $12 for them to custom hone the die and they have it done within a week or two.
As a side note since you mention Dillon dies, in case you're loading on a DIllon press. You might also look into the possibility of doing 2 step sizing on a progressive. I use my custom honed Forster die to size the outside of the case, but I remove the internal expander ball. Then for the second step I use a Sinclair carbide expander mandrel to size the inside of the neck to .002 under bullet diameter. Doing it on a Dillon 550 I decap in station 1, size in station 2, and expander mandrel in station 3. Works awesome and produces extremely consistent, low runout brass.