The C120 is a very nice, sweet and solid model. I've played several of them, and one of my friends also owns one. Yes, room acoustics really matters to the tone of piano. I always find that pianos sound more pleasant in concert halls, showrooms and professional studios, mostly due to environment. It seems to me not the best solution to remove panels. Just my two cents: At first, a new piano will only reach its best sound after plenty of time playing on it. My Grotrian was built in 1991, but seldom used by its original owner. For the first 2-3 years of using, it sounded beautiful, but a little fuzzy, and even blurred when pressing down the pedal. I could only get better clarity by opening the lid, but the sound was so loud and overwhelming (even though Grotrian sounds darker than most other european makes) that other people at home could not do anything except listening to me. But now, just with the lid closed, the tone is fuller, more penetrating, with more strength in the upper middle range of scale. It is really gorgeous! So have you spent enough time playing on your piano? If not, the sound may not develop even for years. Secondly, have you tried of pasting a carpet (or something to absorb more sound) on the wall where you place your piano? Some decoration of the room for better acoustics will be surely effective I think. Hope it is helpful.