Hi Anyone out there give me some comments on the use of theExon mono amps. Have a look at my signature for my present system. Thinking of upgrading to the Exon amps in place of the Maia units. Has anyone else tried this? is it a cost effective upgrade? I like the Rega sound, other possibility is to upgrage the pre amp from my original 2000 model to the Cursa 3, supposedly another good move. Thanks.