Turn them into Active speakers? Obviously you have got more mess with cables but as I have a slot for another Cyrus box I thought go down the Biamp route rather than the Psx R Box with my current speakers, as I am sure I can use a Power Amp with my 8XPd.
With active speakers, the crossover is situated before the power amplification (and is powered, not passive, unlike normal speakers). Once the signal is split into 2 or 3 sections (treble/mid/bass), it is then sent to power amplifiers which feed directly to the speaker's drive units.
What you've described is purely a bi-amped system.