I've finally found time to manage my own contacts with DAVdroid and radicale. I've analized other solutions, but radicale has two killer features that ended up convincing me:

• It's in Debian wheezy
• It doesn't depend on any database engine. It just uses good old plain text to store contacts, which makes it perfect for versioning them with git (I'm aware of calypso).

Now I'm in the search of a lightweight desktop CardDAV client. Evolution, Lighting and KOrganizer are quite all-in-one solution, and that rules them out. Any suggestion?