IF buying an amp first, consider ’extra’ power now IN CASE you might want to try some inefficient speakers (low sensitivity, below 90 db/1w/1m).
Real bookcase speakers are no more than 12" deep, have no ports, and can be used horizontally.
I have re-discovered and reconditioned Vintage AR-2ax, 3 way ’real’ bookshelf speakers, 11-1/2" deep 13 high, 24 wide, 10" woofer, with level controls to adjust output of the mid and tweeter relative to the woofer ’in the space’ to get the best frequency balance in any given space.
Originally purchased for nostalgia reason, Intended for garage/shop, sound soooo good I kept them in my office and bought a 2nd pair for the garage/shop.
I have tools, experience, skills to rehab them successfully, not everyone can do that.
compact with 10" is unusual, and level controls few and far between these days. Perhaps make sure your all in one has balance and tone controls.
Others: Modern speakers that offer similar performance and features???