I've experimented with biamping quite a bit, and have had limited success. My first advice to you is if you're buying two amps anyway try different configs for yourself and see what you like best. That said, here's my own findings:
- I've tried horizontal biamping with multiple amps - identical SS amps, and SS for bass, Tubes for mid/treble. None of these were preferable to a single stereo amp (ie one of the amps used in the biamping), and all were materially inferior to a set of higher power mono-blocks.
- I've tried vertical biamping with identical stereo SS amps and have experienced favorable results - but it's speaker dependent. One set of speakers preferred the higher power mono-blocks. Another appear to be optimized for vertical biamping. You really, really need to read the thread that Almarg references - especially Steve McCormack's post.
- Finally, I know nothing about your amps, but have been told by amp Mfg's previously that stereo amps bridged to mono configs will NOT sound as good as running the amps in non-bridged mode. Parasound recommended running their amps in what they refer to as "single stereo" rather than bridged, saying that the power output is greater because the the single channel has full access to the power supply which will increase the rated power by about 30%. "Single stereo" is using only one channel from a stereo amp, and letting the other sit idle. You should consult your amp mfg about this as amps differ a lot. You should also consult your speaker mfg to hear what they recommend (ie high power mono, or biamp with 2 stereo amps).
- I've tried horizontal biamping with multiple amps - identical SS amps, and SS for bass, Tubes for mid/treble. None of these were preferable to a single stereo amp (ie one of the amps used in the biamping), and all were materially inferior to a set of higher power mono-blocks.
- I've tried vertical biamping with identical stereo SS amps and have experienced favorable results - but it's speaker dependent. One set of speakers preferred the higher power mono-blocks. Another appear to be optimized for vertical biamping. You really, really need to read the thread that Almarg references - especially Steve McCormack's post.
- Finally, I know nothing about your amps, but have been told by amp Mfg's previously that stereo amps bridged to mono configs will NOT sound as good as running the amps in non-bridged mode. Parasound recommended running their amps in what they refer to as "single stereo" rather than bridged, saying that the power output is greater because the the single channel has full access to the power supply which will increase the rated power by about 30%. "Single stereo" is using only one channel from a stereo amp, and letting the other sit idle. You should consult your amp mfg about this as amps differ a lot. You should also consult your speaker mfg to hear what they recommend (ie high power mono, or biamp with 2 stereo amps).