I run the front r/l speakers in my home theater vertically biamped using 2 Electron Kinetics Eagle 4 amps (they're 2 ch @125 w/c). This configuration is far better than any other I've tried (and all other amps too. (see my system page "media room for one"). The speaker designer (Albert Von Schweikert) recommended this over using one higher power amp.
The only extra cabling it cost me is a "Y" adapter on the I/C. Even when I didn't run biamp, I still had bi-wire shotgun runs because my speakers require it.
The only extra cabling it cost me is a "Y" adapter on the I/C. Even when I didn't run biamp, I still had bi-wire shotgun runs because my speakers require it.