I like using an independent crimping operation to insure there is no scraping of the bullets when a crimp is formed while seating. In the distant past I spent a lot of time with a dental pick getting the little rings of lead that result from one-step crimps off my case mouths. But for revolver, I think the
Redding Profile Crimp Die is probably the best one currently on the market. It is a roll-crimp die with the lead into the crimp shoulder designed to prevent the case from buckling outward due to over crimping, so it allows harder crimps to be formed in magnum loads.
I also prefer the Lyman M Die style of stepped mouth flare to help bullets start into the case straight, which keeps them straight which actually does improve accuracy a bit. You can buy
Lyman's Multi-expander Die, which is also a powder-through die, and it comes with inserts for all common handgun calibers so you buy just one and substitute it for the expander that came with any other handgun cartridge die set you bought.
Understand that neither of the above options are essential, but they do help make better ammo, IME.
The Lee sizing and handgun seating dies seem to work as well as anybody's. Some don't like their rubber o-ring insert lock rings, but others (John Feamster described this trick in 1995, which was the first time I saw it mentioned) will take an RCBS lock ring and put an o-ring under on the press to cause the die to float to self-center during sizing and seating. Lee has that trick covered for you, but it does mean adjusting the ring every time you take the die in or out of a press. And the floating really only matters to rifle accuracy levels.
If you have a difficult bullet nose shape, I think all the manufacturers will make you a custom seater ram for a fee.