voodoochillin,
My experience with the JA speakers and lower powered amps is limited.
In the store they sounded stellar with both SimAudio and Mcintosh tubes amps.
I can’t remember if it was the Mcintosh 75W or 150W tube amps.
Though I think I was probably most impressed with the JA speakers with the Simaudio amps. Best grip and control, but still super smooth and beautiful sounding.
At home I’ve only used them with my 140W CJ tube monoblocks, which work beautifully with the Perspectives. I did some long direct comparisons of the CJs vs a Bryston 4B3 amp in my system and the Perspectives sounded excellent with both, a bit more grip in the bass and solidity to transients etc with the Bryston, but overall I definitely preferred the tube amps for the more fleshed out relaxed sound, though the CJs also provide plenty of guts and punch.
I still don't really know about the JA ultimate requirement for power. In principle, unless you play them super loud a lot, a well designed lower power tube amp should work well with the impedance, despite the lower sensitivity.
Note that the Soundstage Pulsar reviewer used an 80W tube amp with the Pulsars and raved, and the Part Time Audiophile reviewer reported his most satisfactory results with a 25W SS amp in class A mode.