You're in luck!! The latest issue of BIMMER magazine (Aug/05) has a comprehensive buyer's guide write-up. No, you can't download it...but you can go to your local bookstore/magazine store (Barnes & Noble/ Borders) and purchase one. It is worth the stand price. Everything you want to know about the E39 5 series and some stuff you didn't even know existed is in the article. This issue is a definite KEEPER!
(note the top caption on the cover right next to the image of an e39: 1997-03 5 Series Buyer's Guide )