Both RCBS and Dillon are top-notch. I've used both of their warranties and they deliver.
I have an old Reloader Special press I bought used. It didn't come with the primer tray and I called RCBS to buy one. They sent it for free. At the same time I needed some pins for the Universal deprimer die set, again they sent some pins and one of the mandrels for want of a better word, that the pins mount on, for free. And the kinetic bullet puller collet was worn, no problem, with the same mailing came a free collet.
I have a Dillon 550B, which I really like. I broke the primer alarm case, told them I broke it, they sent me a new one. I also bent the primer activator rod and was sent a new one. These are both things I broke, and told them I broke them, and it didn't matter.
You can't go wrong with either company, great products and great warranties.