w4s sti1000 or belles 150a ref for audio physic??

I am looking at these two amps but havent been able to hear them. I currently own a cec amp5300 which is class a ss and very musical and smooth, but i need more power.
I am looking to get a musical but detailed sound that is nonfatiguing but dynamic at the same time.

I am leaning towards getting the sti-1000 integrated or a modwright preamp and belles 150a ref.

Any opinions???