Wore out a Lee press doing .308 for my M1A. Needed something bigger so I went with a RCBS Rockchucker. Rock solid and the warranty is great. Did some damage to the Rockchucker (don't ask how :-[) and got replacement parts at no charge within a few days. Got loads of RCBS dies and equipment so I stick with what I know is good. Lots of other brand gear out there that's good stuff but I wouldn't hesitate to recommend RCBS.
Never used Dillon gear so I can't speak about them. I've heard good stuff about them. I prefer a "single stage" press. Gives me more chances to see my brass and check for mistakes. Seen too many rounds not get powder in them from progressive presses so I'll stick with my single stage gear.