The critical opinion in this case, is clearly yours. Which one sounds better to you? That is the one you should buy. With the usual caveats etc. etc.
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From doing a quick google search I saw a fair amount of positive reviews of the Classe CAV 150. Is there any way you can audition it? Does it have a lot of hours on it? What gear are you going to use with it or the Emotiva XPA-5?
Emotiva does have the 30 day return policy on their products if you find you don't like the amp. Lots of XPA-5 owners are pretty happy with it though for HT. I own a UPA-7 and am very happy with it.