Re: basic dies or?
I started with basic RCBS 2-die sets in the early 1990's and haven't seen any need to replace them. I have acquired some dies secondhand since then, and they are mostly Redding baseline products. They seem to work the same to me.
My .260 Rem dies were a gift, are Hornady New Dimesion Dies, and they work well; being perhaps especially good for reforming .243 and 7-08 to .260, with their elliptical neck expander. The collet-type decapper/expander fastener tends to be somewhat awkward, but that's probably just me.
I think that special micrometer dies sets can be justified, I just can't manage to do it for my kind of handloading.
I may not be able to duplicate their precision; but for what I do, I'm sorta convinced I really don't need to. When I invest reeasonable time and care to my dies setup process, the ammo I produce is at least capable of outperforming the likes of me.
When I miss, it's not the dies that should receive the blame.
Greg