Super Leads...can certainly be harmonically complex and rewarding amps. I have owned a good range of Marshalls and had definite favorites. (74 50 watt JMP)... When I last was gigging with a psychedelic rock type band (Black Angels, Spacemen3) it got the sounds that I needed. In a loud rehearsal environment you can work out the dynamics and really enjoy playing. I was playing single string leads trying to get over someone playing open string chords through a cranked 50 watt 2x12 set up in the air. I needed the volume.
I wish that we had learned to moderate, even going down to 20 watt type amps. I have a lower wattage Reinhardt now and it is dead on, just perfect Marshall mid range and overdrive. I don't use it it very often, however, I am just into other tones these days.
Sound engineers hated us live...most of the time. Definitely did the turn the cab around thing...no master volume
The amps are heavy, the cabs are huge, the volume is just too much. I can get killer Marshall tones through some smaller amps and even UA plug ins. I was never satisfied with any attenuator I owned...(THD, Marshall, even the super detailed Weber Mass attenuator)... The OX system + large amplifier heads is just a lot of money relative to what I want out of the sound. For all of the incremental tone gains that we rationalize exponential expenditures to achieve, so much is lost in a larger mix.
It certainly makes one feel good to bask in the swagger inducing aura of a big ol Marshall super lead. If you have the space and the hair cells to burn in your ears...there is a very good reason why they are famous. My tastes have continued to gravitate away from that sound and that type of music, so I have sold off all of the Oranges, Marshalls, etc... every time I see an old Orange cab or a JMP in a used store I still have to look closely, hard wired into my id.