Recommendation on power amp

And, if you can't swing the $15K, their Stellar line (S300 and M700s) is next best. I have the M700s; finest amps I've ever heard.

From what I know the Parasound jc-1’s are a pretty fancy pair of amps.
Where do they fall short?

What sort of sound are you after?
What’s the size of your room?
Tubes are nice, but I’d go that route in the pre-amp stage, longer tube life, heat, power consuption - yada, yada. Good tubes are expensive, and in power amps, well, they can complicate things .... but that sound.
A/B amps .... bullet proof.
Class A amps ..... oh that sound, but - heat can be an issue, eventually some of them cook themselves after years of use. But IMHO Class A amps are sweeter.
Again .... what are you after?

Love class A but tough in the summer months...

Don’t get me wrong , the jc-1 are good amps. When I play my music louder the music seems to get congested. I feel it’s the transition from class a to class a/b operation. And also omg in high bias they cook. I can feel that the bottle neck are the amps and the speakers can sound better at louder volumes with an amp upgrade. 
and again it’s the upgrade bug and right now it’s the power amps in the spotlight
 
thanks everyone. I am sure there are very good amps out there but I have decided to get a pair of mx-r twenties. Special thanks to everyone who helped me make this choice. 
thank you