I play a Petrof!
High-gloss ebony finish, 5'8 grand piano. My house is too crowded for anything else, and I'm just a student. It's beautiful, small, but I personally love the sound quality and the way it plays. The keys a stiffer than my teacher's Yamaha, but control is fine. It strengthens my fingers, I guess!
I bought it maybe 5 years ago, in 5th grade. Back then, I bought it because I loved the way it looked -- it was simply elegant. I've developed an appreciation for it though, I love the sound. I played on the other pianos at the show where I bought my baby, but I preferred the Petrof to all the others-- my father hated it, he liked the brighter sounding Yamaha. Debussy sounds fantastic on it, I think

It's a nice, mellow sound, but it's got the flexibility to play fast and furious too. I know it sounds different from other pianos I hear, and I may be just a bit biased... but I think I have the best sounding piano

Anyway, I have never tried a Bosendorfer and I've never heard of a "Forster" or "Bluther". The only pianos I have experience with are a few grand Steinways, Kawais, Yamahas, and Nordiskas I tried in a piano shop, and Kimball, Everett, Yamaha, Nordiska and Kawai uprights. And I must say, Petrof is a good piano -- I heard it has a reputation for cheap prices, but I don't feel that it affects the quality. I know good pianos are super expensive, but the Petrof is a good deal, I think.