I have owned a Bosendorfer 275 9ft concert grand for 30 yrs and love it but it takes careful tuning and voicing. I have performed on Steinways, Yamahas, Baldwins. My favorite is is the Bosendorfer 295. A beautiful instrument with weight and velvety highs with long decay. Malcolm Frager playing Chopin on Telarc and Ivan Davis playing Reminicences of Norma live are superb. The 2 Brahms and Ravel p.c. are lovely. A list of pianists and their works is another topic.
I find my Apogee Divas (Graz refurbished ribbons) and Scintillas driven by Krell amps and Audio Research tube preamps to offer extremely realistic reproduction of these pianos in my 20x27 listening room. I would put this system against any system today for classical, jazz or folk music (they are fine with rock but use a bit more punch). They offer a wide and deep soundstage, lightening fast, floating a lifelike image without inflating the size of the instruments. Only vinyl (Mapleknoll table) really can do justice to the dynamics and timbre of a concert grand with an orchestra. I have not heard a speaker system reproduce sound better - at least none under 100k - and they are 28 and 34 yrs old, respectively. I have not heard the Maggie 30.7 yet, but I'm good!!