I was always a Levis zippered 505 kind o' guy, as they always seemed to fit me better than any other brand and style, BUT just recently I bought a couple o' pair of Kirkland brand bluejeans at Costco, and if I didn't know any better I'd SWEAR they were "real" Levi 505s! AND, at ONLY 14 bucks a pair, I think I'm gonna stick with these from now on.
(...of course the only problem with that is that Costco only occasionally has this kinda stuff, and so it's usually a hit-or-miss proposition)