Used Thiel 1.5's are a good a sonic match with the older Classe amps. I couldnt' comment on that piece though. B&W Matrix 805's or 804's might fit that price range, and will sound good with the Classe's, albeit a slightly warmer sounding speaker. The Thiel is more neutral in the bass/midrange, but a pinch pushy in the lower/mid trebble. I used Thiel 1.5's on Classe CA150's, and it was as nice as you could expect at that price range for SS amps. YOu'd need stands for the 1.5's however for best soundstage height. These two speakers are going to sound about as refined as you'd likely get at those prices, and let you hear more of the music like it was recorded.
Good luck
Good luck