I would not be in such a hurry to get rid of the Aragon amp.My original purchase of any high end equipment was an Aragon 2004 MK II that I purchased new in 1991. I liked it enough that I kept it until a couple of years ago when I needed more power. I have also owned a pair of the Classe CA 200's (rear heat sinks)that I ran both vertically biamped and bridged on a pair of Legacy Whispers. I also tried Legacy Monoblocks, Aragon Palladium I's and currently own Aragon Palladium II's. The Classe's are nice sounding amps. I ended up with the Palladium II's for a couple of reasons. When vertically biamping the Classe's did not control the woofers as well. When bridging I believe they did not match as well with the Whispers. I think this was due to a very low impedance load that the Calsse's did not like all that much. It wasn't that they sounded bad, it was like some of the midrange life was sucked out of the speakers. For my application, the ideal set up may well have been a Classe CA 400 on the bass with a CA 200 on the mids and treble.
I found the Classe and Legacy Monoblocks to be very close with a slight edge to the Legacy in the midrange. I did not like the Aragon Palladium I's at all which was a major disappointment to me. I thought they made the soundstage 2 dimensional and sounded a little thin in the bass. I honestly expected them to be better than they were. I had also at one time owned an Aragon 8008 x 5 when I was concentrating more on theater and liked the sound of the 8000 series amps. I decided to give Aragon one more try and bought a pair of Palladium II's used. I am certainly glad that I did. To MY ears in MY system, they were clearly the best match to the Whispers of those that I tried. Great bass control with good midrange presence and very nice highs.
If I had to rate them it would be Palladium II's first, Legacy second, Classe a very close third and the Palladium I's a distant fourth. Note that these are just my observations. The biggest difference with the Classe when either vertically or horizontally biamping the Whispers was control of the woofers. Midrange on up was extremely close and would be a matter of preference, with the Classe being very slightly more laid back in the low treble.
I have since sold the Whispers but have kept the Palladium II's. I would not hesitate to buy the Classe CA 200 again because of its grain free sound, but it would have to be matched with the right speakers to perform its best. I hope this helps.