Re: 308 dies
Lee's dies are, on average, as good as any other conventional type dies. Only things you can count on to be consistantly "better" than conventional dies are the premium priced dies from Redding and Forster. IMHO.
The RGB die sets don't include a shell holder or a crimper or neck sizer as the Pace Setter and Delux sets do but the quality of the sizer and seaters are exactly the same.
Lee doesn't put the emphesis/money on exterior finish as others. They are designed to be made on precision CNC machine tooling operated by semi-skilled operators and they produce ammo of as good quality as their common competitors. Pretty stuff costs, Lee's tools aren't pretty but that saves us money!
Common dies actually work pretty well. You could triple/quadruple the RGB die's price and get a premimum set but it will take a LOOONG time for your loading skills to exceed what the RGB dies can do. The much more costly dies don't normally make a massive difference in accuracy even when they make a difference at all; fact is, the reloader's skill is much more important to accuracy than simply looking at the price of his dies!
IF you were willing to spend any more money I'd suggest you start with Lee's Delux die set. You would get the same basic dies as the RGB plus the best neck die available for factory rifles (IMHO), and a shell holder that's worth several bucks.
Good luck!