Accuphase Bookshelf Speaker Pairing recommend

Fyne Audio F500SP a wonderful lively speaker! Way more fun than a Harbeth.

Bookshelf Speaker or Small Speaker

True Bookshelf Speakers are specifically designed to fit IN a bookcase, either vertically, or horizontally at seated ear level. Depth no more than 11-1/2"; recessed connectors; NO PORTS. (perhaps a front facing port).

IF Vintage, IF Restoration is a consideration, I just renovated a pair of AR-2ax’s (initially: nostalgia for my garage/shop system). They sounded better than all the other small speakers I have. In my office they went, I’m renovating a 2nd pair for the garage/shop. Every thing you need is available.

For compact speakers, look closely at the Dynaudio or Totem models at or near your budget. Hard to beat these brands at the 5.25” 2 way game! Bison monitors with a 30 day trial may just do it. Great amp, btw. Enjoy.

note: placement is of great importance in any speaker selection, and we know nothing about what restrictions your room layout imposes, if any.  Most of us may assume you have the freedom to put stands away from room boundaries to optimize loading, imaging, etc. but that is often not the case. Always bear in mind that the “best” choice is what fits the conditions of use actually in effect.

Since you don't have a budget consider the Opera Callas standmount which could have the tonality/detail/control desired.

Wow, thank you for all responding.  I may not buy most of these, but my Black Friday "cyber window shopping" on these speakers on-line has been fun and informative.