"I regret every RCBS die set I bought"
Really? Kind of harsh, since RCBS has a very good reputation.
I have RCBS, Hornady, Lee, Redding, Forster and 1 Lyman die. I do not regret buying any of them. I know 1 thing, if I ever have a problem with an RCBS die, it will be taken care of promptly and at no cost. They have done it for me, even though I told them it was my fault. I can not say the same about a Lee die. I have bought Lee dies, when I could not get others and I felt, I just had to have it now. But I know I am taking a chance too. Some times you get what you pay for. Don't get me wrong, I really like the Lee Collet dies, but I know that if something goes wrong with a Lee die, it is on me.
Maybe it is just me, but there just seems to be a smoothness about the better (more expensive) dies, that the Lee dies just do not seem to have. But that is my opinion, others will vary. Usually, when I go cheap, I later regret the decision...not always, but enough to make me really think about it a lot before buying the cheapest in the future. So, I do not let price drive my decisions, it is considered, but not the be all, end all answer.
Good Luck and Good Shooting