I used my Jolida JD302b tube amp on my M80's when i got it just to see how it did and was very surprised at the levels I could get to with its relatively low power output compared to my Odyssey monoblocks. Would I choose something like that as my primary amplifier? No. I would want something with more power. But could I be happy with it if I had to? Sure.
Your CJ is nearly the same power in ultralinear mode as the jolida. If you like the M80's then get them and give them a try on your current amp. If you need more then you can always do it. Thats just my opinion. Although, I think inevitably... you'll want more.
