Hello Tom,
I, for one, would be highly interested in seeing/hearing what a souped-up 3.5 can do!!! I have decided to build my system around these amazing speakers. In fact, I recently replaced my Denon PMA-2000 IVR integrated (very good sounding, Mid-Fi or not!) with an ARC LS-7 line stage, PH-3 phono pre-amp and D240 MKII amp...all in effort to make the Thiels sing just that much better!
I have always used the Bass EQ. While there were those who preferred not to use it for purity-sake, I always felt that there had to be something to it if Jim Thiel designed it specifically for the 3.5's. With it, it wasn't hard to hear that the 3.5’s played lower, with more power and clarity, than my previous Martin Logan set-up (Motion LX-16 monitors WITH a Dynamo 300 subwoofer) ever did...This is truly a full-range speaker. It didn't take me long to realize that I've finally found speakers that I could live with for a very long time.
Anyway, excuse my ramblings. Yes, a "super" version of a 3.5 would be an awesome idea, one I’m sure any owner, previous or current, would be interested in.
Thanks for your participation in our discussions...your insights and observations have been very informative and revelatory.
Arvin