I know this has been discussed many times, but i'm quite confused right now how to set up sync.

This is what i want: sync contacts and several calendars (mail would be great but not a must). I use Ubuntu so ActiveSync is not an option. At the moment i use Thunderbird and Sunbird, but i would switch e.g. to Evolution if necessary.

Which way is the less complicated one to get the sync:
- sync via google calendar (several calendar-sync possible?)
- sync via own Funambol server and Syncevolution

Are there other better ways to get the sync done?