I came to your forum to ask this very question. But can you really justify breaking up Pleks and Kovy?
I wouldn't have a problem with it. Plekanec has good chemistry with Higgins that goes all the way back to the AHL. He's also shown good chemistry with both Kostitsyns. In fact, the Higgins - Plekanec - AKostitsyn line was great down the stretch in 2006.
Someone mentioned Straka. I think SKostitsyn could be the new Straka on a 2008 Kovalev and Lang line.
Anyway, there are so many possible combinations, as Marc said.