I'm using a pair of Cambridge 840s. They're a lot smaller than the CA-300. Their combined power is probably comparable to a single CA-300. I have my doubts about whether a pair of CA-300s would be significantly better than one. That's 1,700 watts/channel into 4 ohms, a lot more than you can get out of the wall.
I used to use a pair of Classe CA-200s but they both developed some intermittent crackling that the shop couldn't fix so they've sat unused for about the last 8 years. They are very good and powerful amps but they definitely have a bit of a warm sound. I prefer the sound of the Cambridge amps as I find them a bit more neutral. The build quality isn't as good as it's a Chinese made, more budget conscious brand. They've operated flawlessly for about the last eight years so I can't complain.
I used to use a pair of Classe CA-200s but they both developed some intermittent crackling that the shop couldn't fix so they've sat unused for about the last 8 years. They are very good and powerful amps but they definitely have a bit of a warm sound. I prefer the sound of the Cambridge amps as I find them a bit more neutral. The build quality isn't as good as it's a Chinese made, more budget conscious brand. They've operated flawlessly for about the last eight years so I can't complain.