(clicky more wikipedia url)
Then this is what you're going to want. It's an Israeli MBT (Main Battle Tank), that was first trialed in 2005, passed in 2006 and is in service since 2007. Currently 170 of them built, which is impressive for being a less mainstream tank, which brings me to my next main point. It's definitely going to set your project apart. As an added plus, it is very sharp-edged and as far as tanks go, the topography is going to be relatively easy to get right. Don't get me wrong, it's going to be a bastard cubed, but it's going to be easier than most others.
The turret pitch mechanism is going to be easy as well, considering it's only a rotating triangle that goes up.
Edit: example