Small room amp and speakers recommendation

Harbeth P3esr, Naim Uniti Atom and SVS sub.
Somewhat over your budget but I find it to be a fantastic combination.

I have an ARC VSi55 integrated and Harbeth P3ESR speakers in my small computer room.  It doesn't have the scale of my main system, but it's the best sounding system I have.  Add in my Clearaudio Emotion turntable, MHDT Labs Orchid DAC, and Parks Puffin phono stage (all bought used) and this system is around $5K.

Because you’re listening to mostly acoustic, I would also vote for Harbeths, which are easily available second-hand.  I have had 30.1s for years, and they are just right in high mids and treble.  Enjoy shopping and set up of your new system.

If you're handy, ditto on the Solstice from Parts-Express...Morel drivers and very well designed.  Continueing on that theme, you can also build an Akitika PR-102 and GT-102.  This will run you just over $2K, leaving room for some very decent cables and tweaks.

If you have to buy a factory made speaker, try the Dali Rubicon 2s with the Akitika stuff...$3500.00 with budget room for stands & cables.

In my apt: my kitchen/dining room/game&TV space is approx 12x12, with sloping walls 5' then angled in... I'm using a vintage Pioneer Elite DVD/CD Player  ($50) into a vintage Parasound HCA-75a power amp with volume controls on the back ($250). Add a pair of KEF ONE bookshelf speakers, a Silnote Audio power cord and interconnect - and I' m golden for vocals (especially female), acoustic piano and vibraphone ("Crystal Silence"), what I call Ereathral (Enya, Dead Can Dance) and light jazz and rock... If I feel the ' need ' to really rock out: I add in a Monoprice Integrated amp ($250) with another interconnect  (using the pre-out) for better definition and volume control, and swap out the KEFs for a pair of JBL L25 PRIMA speakers ($450) - and I've got bigger sound... There are so many choices in the vintage/used market - but as a core: I'd start with a PARASOUND HCA -75a or 1000a: good cheap power cheap power you can double up with 2 in mono. I believe the 1st key piece should be your power amp - the piece you will least likely change as you expand/refine your system over time... Ànd Vintage/Used is the way to go...