My dad gave me his Classe CA150 amps (2) and I am going to add them to my system (FF3 SRE) with outboard crossover, should I vertical or Horizontal Bi-amp? Part of me thinks keeping woofers isolated makes sense and part of me think Vertical is a good idea so help me make up my mind, I am replacing Aragon 4004MKII and Carver (for woofers) so I never have had identical amps to ponder this. Thanks for any help.