Excessive brightness and volume may be the result of any grand in a small room. They are built to project to an audience out to the right of the player.
While grands are prestigeous, for most purposes a vertical piano is more satisifying to me in my small rooms. Only the middle pedal of a grand is unique to me over the vertical function, and only a very few advanced pieces make use of it.
The early eighties Kawai upright I played was okay, but I prefer the sound of Sohmer, Baldwin, Wurlitzer Mason & Hamlin, all pre-globalization (prior to mid eighties production in most cases). Steinway 1941 was great, the modern verticals are too heavy for me and project sound not at the player.
If you like less high frequency, a duller tone, a Baldwin Howard may be more pleasing to you than an Acrosonic, which is very bright. Wurlitzers are more mello than Acrosonics, as was the Mason & Hamlin I tried. Wurly & M&H have less ping. I find Everett & the followon Yamaha verticals dull. Brightness is swallowed up at my house by filled bookcases, record racks, carpet, and upholstered furniture.
Any modern production piano, be sure to check how consistent minimum volume is from key to key. An import "Wurlitzer" in a student's house was very uneven when given that test. Also check maximum volume, also ultimate repeat speed of a single note (using two hands). Do these on any piano of course.
Tonal match between top, middle, and bass keys is important to long term use. Intermediate students and above can use all 88 keys.
Have fun shopping, and don't be afraid of used pianos. In most cases I find them superior to what is in fashion these days. See this to sort out the trash from the gems: https://www.pianostreet.com/smf/index.php?topic=58857.0
Most old pianos were bought for prestige and just sat, few were actually played very much. Pianos are not cars, there are no rubber parts to deteriorate just sitting still.
Have fun shopping.