This also raises another possibility - Audyssey. I've gotten great results integrating my subs with Ohm 100s using Audyssey in my main system, but - as a practical matter - it means replacing the preamp with a pre-pro. That's not going to win over too many 'philes, but I think it's easily worth it. Crossing in the digital domain and EQing the FR makes the "hand-off" from subwoofer to speaker impressively hard to detect.
However, if you use analog sources (I don't very often), it means either taking the subs off-line (direct mode) or subjecting your analog sources to ADC and DAC. I'm okay with that, but YMMV.
However, if you use analog sources (I don't very often), it means either taking the subs off-line (direct mode) or subjecting your analog sources to ADC and DAC. I'm okay with that, but YMMV.