[LS]

Yeah, but remember, you can add fairly lightweight "reactive armor" if you really need it, and dramatically increase the survivability. The Brits never used reactive because of the Chobham, and we apparently never thought we needed it. But the Russkies did.

[DarkWaters]

The Russians have the perfect anti tank missile(Kornet) that will penetrate any reactive armer, it is based off; the thermobaric effect.

http://www.army-technology.com/projects/kornet/