Any product is good until it breaks...well seems to be good. I really like the looks and feel of RCBS and Redding dies with Forster and Hornady dies a close second. The only die failure I have had is a Lee collet die for the 223. It was my fault, I put way too much pressure on the press and it stripped out the top of the die, which is made out of aluminum. I still like the Lee collet dies very much and still use them and will continue to use them into the future. With that said, I prefer other brands. I have lately, started to mix my die sets. For precision reloading I really like top of the line Redding or Forster for my seating dies, however, the top of the line RCBS seating die with a window in the side is very good too. For full length sizing dies, I am not so picky, but like CW said, it is very hard to beat RCBS for quality and service. I have Lee, RCBS, Redding and a few Hornady full length dies, depending on what the case is and what was available when I got the dies. If I can not get a Lee collet die for neck sizing, I get a "S" type die that takes bushings to size the neck with the majority being Redding. That is for precision reloading. A Redding "S" type die with a few bushings and a precision seater die gets a little pricey, but i spend a lot of time at the bench and consider it part of my shooting experience, so it is justified in my book. For general reloading I get full sets and back off the full length die 2 full turns to neck size. Again I buy different brands depending what the case is and what I can get at the time, some times Lee, but most times not. For pistol cases (straight walled) I will get sets of dies, but carbide (I really hate lubing and will avoid it when ever possible). I prefer Redding, RCBS, Hornady in that order for die sets in general. I have dealt with Lee and RCBS customer service, believe me they are in two different worlds. I have come to the point with Lee, if any thing goes wrong, just buy another or another brand, do not even try. RCBS on the other hand has cheerfully replaced MY boo-boo's, not even their fault. I have yet to deal with Hornady, Forster or Redding because I have not had a problem with any product, their fault or mine.
As far as which to use about expander balls, I do not own a 32 caliber or a rifle/pistol that takes a .310 - .312 bullet to know which is best. The advice given about expander ball size should to be followed, I would. For the most part these fellows know what they are talking about. We may disagree on what brand to use, but that is what keeps different companies in business. I have found, for the most part, you get what you pay for.
Other advice have been give here as well such as a Lee universal decapping die. I own one and every single case I reload goes through it. Maul it over, there are good reasons for them, unless you are going to be mass reloading on a progressive.
Good Luck and Good Shooting