Tom, whichever amps you buy, most will be well within tolerances for impedance that you can switch them from Bass duties to M/T duties. Be sure to try them out both ways; you may be very surprised by the results.
Also, do not believe the notion that with a processor you can mimick the precisely same sound as a different amp/brand, i.e. that you can put an el cheapo amp on the bass through the processor and get as good of sound as if you used a premium amp. I have conducted the tests and the quality of the amp shows itself even when a processor is used. If you like the sound quality of an amp, you likely will enjoy it used for the bass. You may get good quality with an active x-over and an inexpensive amp, but you will not get the same quality as with a finer amp.
My experience in cable has consistently been that more total gauge, i.e. 10, and copper conductors yield the best sound for the money. I find that the better sounding cables are superior across the frequency spectrum, not only for bass. Silver conductors have been tricky, potentially excellent in some cases, but overall thinner sounding.
If you are doing longer interconnect runs you will probably want to work with amps having balanced connections. I strongly recommend you use XLR/balanced interconnects for the longer runs, so your amps receiving the longer runs of interconnects will need to have XLR inputs.
More circuitry means more signal degradation. You may wish to consider a dedicated preamp for two channel listening.
Also, do not believe the notion that with a processor you can mimick the precisely same sound as a different amp/brand, i.e. that you can put an el cheapo amp on the bass through the processor and get as good of sound as if you used a premium amp. I have conducted the tests and the quality of the amp shows itself even when a processor is used. If you like the sound quality of an amp, you likely will enjoy it used for the bass. You may get good quality with an active x-over and an inexpensive amp, but you will not get the same quality as with a finer amp.
My experience in cable has consistently been that more total gauge, i.e. 10, and copper conductors yield the best sound for the money. I find that the better sounding cables are superior across the frequency spectrum, not only for bass. Silver conductors have been tricky, potentially excellent in some cases, but overall thinner sounding.
If you are doing longer interconnect runs you will probably want to work with amps having balanced connections. I strongly recommend you use XLR/balanced interconnects for the longer runs, so your amps receiving the longer runs of interconnects will need to have XLR inputs.
More circuitry means more signal degradation. You may wish to consider a dedicated preamp for two channel listening.