I am running the Arros with a Cayin TA30 in a smallish room. It sounds nice, but the Arros are actually quite inefficient and benefit from an amplifier that increases output into low impedances (I confirmed this experimenting with an older Yamaha M-60; not the most refined amp, but the extra grip and dynamics was noticeable). The Arro/Cayin combo sounds great with a lot of music, but if I was determined to keep the Arros I would definitely ditch the Cayin and probably get something like Belles separates or a Plinius integrated on the used market.
Hope this helps.
Hope this helps.