Re: .308 dies
I use RCBS stuff. Why? I guess something initially attracted me to them, and I now have no reason to change.
I use the Competition dies that Ian mentioned. Very nice. Precise control over the length, etc. A bit more money, but to me at least, worth it.
If you don't have any equipment yet, here's a suggestion. Buy the RCBS Rockchucker set. Comes with the press, scale, a set of dies (?), and some other odds & ends stuff that you'll need to get started. Check out the various catalogs & on-line sites to find the best deal. The Rockchucker is the only press you'll ever need. You can add stuff & fine-tune later, as you get more involved & see what you do (and don't) need.
Have fun, & let us know how things work out.