I have owned Selmer Mark VI alto a handful of Yamahas from 26-82z and all are very nice horns I sold the Mark VI because I hated gigging with a 6k instrument so I sold it. I had been looking for a Saxophone that was tonally similar (not the same) but with better intonation. A year ago on a whim I tried a Cannonball VR alto and compared it with multiple MK VI's (I must preface by saying none of these MK VI's weren't great or bad but good horns that were set up good) while the Cannonball was very similar tonally it most definitely had it's own sound or the "cannonball sound" if you will. I preferred the VR because of intonation and the price was too good to pass on. I'm not going to claim its the best horn because that'd be ridiculous but when I bought my Sanborn mouthpiece from Drake to pair with the horn suddenly the gap between my Yamaha 82Z and it closed rapidly enough that I sold my 82Z. I am curious though if others had similar findings or if I got the magic CBAVR.