I believe that the 10 may be more popular in Europe, but remember that most countries there, with the possible exception of the Balkans have limited ammo availability, since firearms are restricted for the most part. Also, hi caps are no problem there.
Go to any of the gun shops in your area and survey what they have. If they have more 10, buy it. Ditto for the .45.
Macedonia has many ethnic groups who are at odds with each other (as in the rest of the former Yugoslavia- something you know as a resident), and you may want to consider whose territory and villages you'll have to go through for more ammo if things spill over from Kosovo, or who (ethnic groups) owns the gun stores. Stock up!
I own the 20, but am also going to buy the 21.
[This message has been edited by B Shipley (edited October 03, 1999).]