@ IndyJones
Keep in mind that there are still players out there who are not interested in the new game titles out right now and hence find no need to upgrade their computers. So it is very important to make it run smooth even on old computers. Also people still complain about laggy maps to these days so the idea that most people have now up to date machines is a complete rubbish and a great excuse for developers/mappers.
@ ischbinz
The tank looks alright but you can save at least 41 000 vertices on that model and still make it look nice. Most players who will focus their sights on that tank will experience awful spike of lag and not to mention how much stress this will put on the game engine.
Here is a small example from me.

42 000 vertices less and looks relatively good. What I am trying to say is that too much focus is right now placed on adding details on the model itself than it should be.






