I am also (and still) considering to buy COTA, and am close to it, but strolling around at the Matrix site I learned that there is another game as well that might interest me, Commander - Europe at War. Does anybody know it and can give some feedback? I'm currently stuck in decision-making and can't decide which one of the two it should be.

Just that it is time for some good wargaming title again, that'S for sure. Both seem to be very strong contenders.
http://www.matrixgames.com/products/....Europe.at.War
I am also considering Close combat modern Tactics.
Strange that most of such games focus on history, but only few focus on the modern era - this would interest me most. A WWII-title always is a compromise for me.