tomthiel -
I have owned 3.5's since 1979, and currently run four in a pseudo 5 channel system (bridged front L-R, for better stereo on non-surround-sound discs). I also have a third equalizer since one or another of the channels on the first two alway seem to be noisy or intermittent.
My main interest is music, not film/video, and interestingly the four 3.5's practically eliminate standing waves, and with their 3db reinforcement, they also essentially require no subwoofer. Plus the bass is smoother and quicker than on my pair of 2 2's, which are in my 2nd system.
I would DIE for a passive-part upgrade of these equalizers. And from comments here, the same can be said true of many other 3.5 lovers. Please keep it on your "to do" list.
ps. BTW, I lived in Prospect, KY from late 1979 through early 1984, and recall being at a friends house when Jim auditioned his 3.0's or what I might have been early versions of the 3.5. I lusted until I ran into the dealer demo pair I bought up in Burlington, VT in 1989. So just know: I now lust for three upgraded external equalizers! But I hope another six years don't go by until my lust is fulfilled.