What is the best/your favorite management software?

[MarloSchneider]

Currently my company uses basecamp with a splash of google docs a little bit of Paymo, and Raventools for project management.  (We use other tools like SEOmoz, but not so much for management as SEO tasks)

The ideal features we are looking for are:

Collaborative document editing and sharing(Google Docs)

Task lists and project organization (basecamphq)

Time Tracking on a per task basis (Paymo)

(SEO tracking software is great too, but it doesn't have to be integrated with the project management directly. Currently using Raventools and SEOMoz along with some smaller tools.)

The project management side can be completely separate from the SEO tool side, but it would be great if there was one simple interface that all of this could be done from.

Any suggestions?  Are there features I'm missing in my current software that could bring them up to this level?

[HDI]

We're currently using 5pm for project management. I've used basecamp as well, and think 5pm is a bit more streamlined. Just an opinion, though.

[JaspalX]

We found 5pm a bit unfriendly to use, ended up with cohuman which is much easier and integrates with gdocs. It isn't as good as 5pm at the high level for project overview. None of the team likes base camp though we have to use it for one of our clients.