there are plenty of amps that will work fine. I have CLS I's (the hardest to drive of any logan?) and also Aerius Is. Have driven both with no probs off a CA200 Classe (2x200), Conrad Johnson Premier 5 monoblocks (2x200 el34 tubes) and off my 47 lab gaincard(!) - 2x25watts. In some ways the gaincard was best, even though the lowest nominally rated power. Dont' beleive all the stories about how hard these are to drive... they aren't quite as bad as legend would have it.
enjoy,
-Ed
enjoy,
-Ed