I use Lee, RCBS,, Redding and Dillon dies. Mainly Lee's are used for pistol, but I do have some Lee rifle dies and have been happy with them. Did have one 30-30 set that really sized my brass down way too much, but found a used set at a gun show and that Lee set has been great. I prefer Redding followed closely (very closely) by RCBS, then Lee. My Dillons I got great deals on, otherwise I would probably have Reddings.
customer service by RCBS has been outstanding, the few times I have needed it!!