Speakers choices for AR REF-5/75s


Hi Folks-

Upgraded to Audio Research equipment and am driving a pair of Audio Physic Sparks. They were perfect with my SF Power 1 /ARLS2BMKII set-up. 

The speakers still sound is good. I like the sound staging, and ability of the speakers and amp/preamp to recreate the acoustics of the place the music is recorded in. BUT I'm looking for something else/more. Not sure what. Perhaps a tad more life/edge, which is why I'm soliciting advice.

My room is 12' x 20', with my sofa about 8 feet from the speakers, which are a 4' from the wall.

New or used, my price range tops out at $4000.

Thanks in advance!
David
128x128wharfy
Hi Erik-Using Ayre Codex DAC with an ARCAM CD player as transport.
Room treatments- Tapestry on back wall to lessen reflective noise.
Speakers are toed-in using the Audio Psychic positioning placement "secret formula."

Listening yesterday I realized I want bigger sound. If this makes sense, the equipment upstream wants to sound bigger, but the speakers won't let that happen.