I have owned the SP-10, SP-11, and JP-80MC. I have auditioned the JP200 but never extensively as owning. The SP-11 has never been a contender. Interestingly, the SP-10 improved markedly when re-tubed with 6922s for 6DJ8s. I still remember the utter musicality and enjoyment from this preamp as unsurpassed. My JP-80MC usurped the musical crown until I had to re-tube it. I was never able even to approximate the original magical qualities of this preamp despite replacement tube sets from Jadis, RAM, or $$$NOS. I still longed for the re-tubed SP-10. Now I would'nt think of using a preamp (tube or SS) without a remote volume/mute control at least. But I'd be hard-pressed to rack my aural memory and choose between these two classics for the front end honors of my apocryphal audio valediction.
