I used to have a solid state Echoplex, I never really liked it. The space echo basically sounds like a spring reverb with tape characteristics, unless your doing reggae or something very phycadellic- its pretty much un-usable in the modern world IMO IMO. I gave up on tape delay, that studer thing sounds cool. The best ever is a (japanese) boss dm-3 used as a real piece of rack gear. I seriously stopped giving a shit when I got the EMT 140, what more do you want?? Do any real echo chambers still exist???