I haven't heard the Plinius, but I have heard the Sim, and I bought Sim separates for my main system. The I5 is very neutral and open; it has lots of detail, resolution and dynamics. It also has excellent extension at both ends, but I wouldn't call it warm. In fact, my opinion is that Sim electronics should be partnered with warm speakers and cables, because, if anything, the Sim is a bit cold and not harmonically rich enough. If you thought the Plinius was warm but a little mushy, the Sim may be the opposite, cool and tight as a drum. Getting this balance right is subjective, and it's the key to audio happiness. There were no Sim dealers near me, but I called the company and they were very accommodating. They even arranged an audition at a local dealer who was considering picking up their brand.
Plinius Vs. Sim Audio integrated
Has anyone compared these two highly regarded integrated amps? I have heard the Plinius. I love the warm sound and dynamics, but feel that it lacks the low level resolution and detail I want. This is more pleasing to me than the Krell integrated, with detail and grain. I was wondering if the Moon I5 might give me the best of both worlds. I would find a way to demo it before I buy, but I would appreciate hearing any experiences anyone has had with them.