I'd suggest the more simple the better. This does tie more broadly into your approach to email management. Do you aim (and regularly hit) inbox zero? If not, that is the bigger challenge to tackle and this is merely a subset.
That said, I would suggest a couple of sensible filters to split out emails into "for action" and "for information". Don't go crazy on this. I have 2 information folders - cc and news. Obviously just 1 rule to manage the cc, and for news - most of my news-related mail comes from a small number of sources, so I have maybe 2 or 3 rules.
Then you get to inbox management - using the GTD 2 minute guide, if you can do it in 2 minutes then do it; if not, put it on a list (and file the email). Likewise when you review reading folders - if you can read it in 2 minutes then do; if not put it on a list (and file the email).
Do, or do not. There is no try.