If that's the Sony I think it is (model numbers just pass me by they changed so often), then some ATC20's would be ideal (NOT the 10's which bottom out on rock at anything like a good level). The 20SL version was clearer at low volumes than the 1992 vintage ones I had, but aren't big, should fit your stands, they're not too expensive on the used market and you might just like the sound...
I can't go on and I can't go back, I don't feel so matter of fact,
I tried and tried to make good sense, What's the good to try it all again?