Greetings: I prefer E/V. JBL and Altec over all others. As a matter of course I use E/V speakers as upgrades in all of my amps. EV-15B for bass, EV-15G for guitar in cabinets that are designed for 15" speakers, EV-12G for those designed for 12" speakers and either classic EV-10 or Celestion 10" for smaller apps. JBL D series and Altecs are just as good for my money but harder to find and usually too pricey both to buy and to repair if you can find them at all. I sure wish I had the JBL D-130s I owned in the 60s back. They were amazing. I also use E/V SRO and EVM speakers routinely. I have found that most classic E/V designs can be re-coned and frequently with with improved parts for better sound and reliability. The higher the efficiency, the better. It is always easy to add the distortion you wish by reducing or eliminating NFB and using a stomp box. I also like using my Hafler Hellraiser preamp with large solid state amps for instrument amps. E/V 7600 or 1.5 amps work great but Carver PM amps are my favorite both for DJ work and instrument sound re-enforcement. Start with clean and go from there. I love the sound of two or four 6V6, 6L6, EL34, KT88 or other valve amps but I always eliminate the sag tube rectifiers produce by using full wave solid state rectifiers and beefed up filter caps. I know many players like that sound and that is just fine but I am a "clean, crisp. low THD" fan. Maximum headroom, flat frequency response and the lowest distortion is where I like to start. Jim