I'm using the 350.8 with the Magico S3mk2 and I have to say some recent changes in my system as well as the speakers starting to break in (@ 500+hrs) that my respect for this speaker/amp combo has grown immensely. Like certain gear out there that evinces almost unlimited capability to get better and better the more you improve your system and care and feeding setup this combo is virtually unlimited in its capacity to amaze. I do feed them direct from a Bricasti M1SE DAC and just don't feel the need to have any preamp in the mix getting in the way with this combo - and I'm a huge tube guy. It's stunningly resolving across all the major audiophile superlatives. Adding dedicated lines, PC's and source upgrades are all clearly audible and obvious but always musical. I hear a huge, detailed, deep tight powerful soundstage in my room (although I do have to play around with REW some more to optimize the Magico's placement for a flatter FR in room). I did hear a friend's Pass Integrated with Magico S's and felt that was underpowered. He upgraded to the 350.8 and his S1s entered into a completely different league. When I upgraded to the 350.8 I thought the amp was a little slow and dark at first but it was actually my front end computer audio setup and PCs. After a front end improvement it's quite apparent that the PASS 350.8 is a chameleon and a great match for the S3Mk2 that can give the eerie sense of musicians in the room creating music right in front of you, not some high-end sound reproduction system. This is rare and I've only heard this a couple of times in 40 years of this hobby and it's quite strange when you do hear it for the first time, but then you simply CANNOT get enough!