Lee dies are good and will last you a long time. The Lee taper crimp die is very good at keeping the bullet from slipping and helps to load without having the roll crimp.
Some bullets do not need the taper crimp, I.E. coated bullets.
I don't abide by that. Roll crimp is the right crimp, and only light enough to be little more than a taper crimp if plated bullets with no crimp groove. Armscor FMJ also has no groove.
The real question is whether lead bullets will be used. Then the Lee set is too tight. I use the RCBS Cowboy set for 38/357, and my ammo looks like new. The Hornady Cowboy set is a waste, because only the expander gives unique results compared to the regular set.
This leaves you without a separate crimp die, but the seat/crimp combo die is okay too, if you follow the setup instructions exactly.
The wisdom I gather is that 140 is the ideal bullet for 357 and 158 is ideal for 38 Special. I rather like the MO coated 140 "Zinger" in both, but I don't have any accuracy analysis for compromising weight on the 38 Special.
For me, 357 has at least three levels...small gun, target/SD; and full spec, rockem sockem.
-My small guns like model 60 and SP101 currently get 6.5 gr SR4756 with 125 MO coated LTCFP.
-My medium load is pretty stout at 15.0 gr 300-MP and 158 gr SWC. I have an older production 19-4 gun that has tight chambers for lead, so I load 14.6 gr 300-MP with 158 gr XTP, actually a bit milder than the lead load, but the gun isn't as massive to absorb recoil as the guns that get greater power in lead. I just followed the published load for XTP.
-My heavy loads are just purchased ammo at this point. I don't shoot it but use it for carry when seasonal dress allows concealment of a gun that large, typically a Ruger Security Six, an Interarms Rossi 971VRC, a Ruger Match Champion, or a Smith 686, all 4". Actually that ammo is too stout for guns of compromised size. The best shooter with the stout stuff is my 5" GP100. I don't have a Smith N-frame in 357 but expect those would be fun to shoot with the heavy, full spec stuff.
Be sure to buy (or make) coated bullets for the 357. You will do a lot less bore torture to get the gun clean.