Get some older DCM bookshelves, like the CX-17
Easier than most to find, replacement parts are reasonable and plenty, and cost is reasonable too.
These series of DCM square grill coaxials image very well, and have 92db sensitivity, while a lot of speakers that size are usually range from 86-89db. I find this series to sound consistent from a low level until they start getting harsh when uncomfortably loud.
The CX-27 is the next step up from there, and while they are more like a 1/3 sized tower, they are still smallish and benefit from being off the ground anyway, and have better bass extension, down to 35hz vs the cx 17's 45hz.
They sound good plopped down anywhere, but when much care is taken to get the placement right, they do have an accurate "you are there" staging- IF listening to a recording with an accurate soundstage. Lots of recordings don't put an emphasis on getting that right, and some recordings did it unintentionally.
For instance, I have a mid 90's stereo clock radio that makes Billy Idol's "Rebel Yell" sound a mile wide, but would never recommend it for its "soundstage"