This is a discussion on What is the best? within the Travian forums, part of the MMO and MMORPG Developments category; What is the best travian version without bugs ,easy to install ..(version can be 3.6 or 4.0) please somone give ...
It all depends on what you like. You go TravianZ or Dboor.
I would suggest TravianZ.
Dboor has a harder install, is encoded (I think it still is). However Dboor is stable and your host won't care if you use it. Again keep in mind that if it is encoded you will have to get ioncube and decode each page as it loads. Which makes loading times slower.
TravianZ has a basic easy install. It is open source. File structure is fairly easy to understand. The only problem is that it has some bugs (not as bad as it used to be) and it needs optimizing. The biggest problem is the optimizing. It causes a lot of CPU usage with MYSQL. So your host will kick you off their host most of the time.