bronko,
I've got a mix of RCBS, Lee, Hornady and Redding dies.
I don't find much difference in the RCBS, Lee, or Hornadys,
They all have worked well for years.
Only thing I may do different than others is to de-prime and clean cases BEFORE sizing.
So normally, I just buy these brands based on price and availability.
When I need something special:
I do look for a set of Lee Deluxe Dies if
I'm reloading for a bolt action rifle that I want to neck size.
I like the Redding dies for my 7.5x55 due to the difference it does to the case shoulder for K31.
Also use the Lee Crimp die for cartridges that need a real heavy firm crimp.