Hi,
I have made a similar experiment by purchasing a second-hand Yamaha M-40 power amp to try the biamping and a FBQ2496. If you can get a Radio Shack SPL meter (has a known calibration curve available on the Internet) or adecent microphone with an mic amp and know calib data then you might give a check to the Room EQ Wizard home page:
http://homepage.ntlworld.com/john.mulcahy/roomeq/
I have not checked/used the latest version but it looks like it allows defining the "house curve".
I have used the combination as follows:
MA6500 speaker out --> Ascent panels
MA6500 pre-out --> FBQ2496 --> Magnat Omega 380 sub --> Yamaha M-40 --> Ascent woofers
so after letting the Room EQ Wizard do the measurement & program the FBQ over the MIDI I am more than satisfied by results and have decided to leave the "test" setup playing - and it plays remarkably well indeed.
The decision to put the FBQ in the complete signal path below 280Hz was based on measurements that showed big peaks up to 160Hz in my room. The acoustical treatment was not an option (WAF and lack of room) so this solution is likely to play in my system for some time to come. As a precaution I have decided no to boost the dips though
The results are anyway far better than I've ever expected - even with FBQ's A/D - EQ processing - D/A in the woofer signal path.