A buddy of mine is upgrading his system and wants to sell me his pair of Paradigm Monitor 7 v.2s. They sound great together, but one of the speakers has a sizable dent in the tweeter. I think there's a noticable difference between the two speakers due to this damage, but find it hard to dicern from a distance. Should I replace the tweeter if I pick up these speakers, and if so, how much would that cost? Is it feasible to just pop the tweeter dome back out (my guess it no)?