hate to be a dissenter, but just want to put out another opinion. i work on stylesheets every day, and i've found neither one very helpful. i'd spend more time indenting and alphabetizing than working on styles. i don't know where indenting would be too useful since you'd still have to scan the entire document manually. ordering these in sections of the site in which they're used has been most helpful for me.
my tip: use a decent IDE, like Aptana. it'll outline the stylesheet and make definitions searchable and orderable. use whatever order you find most logical for definitions and properties.
the TOC and commenting is probably useful for other members on your team, though.
