@sid-hoff-frenchman I did own a pair of Nord 700wpc/4ohm One Up SE Ncore Class D Monoblocks ($4k) for awhile. They sounded alright, but absolutely nothing sounds like a good tube SET amp to me (I'm very biased about this so take that into consideration), except maybe the XA25 coming in as a close 2nd. I thought having the Nords would be good for when I watch TV/MOVIE or just to save my tubes from wear when I am not critical listening.
I use a Luxman AS-55 Amp/Speaker Switcher to switch between tube and solid-state amps in my system. Now, did having all that overhead make a difference? Yeah you can blow your eardrums out, but most realistic listening levels are achieved at much more pedestrian wattage levels. The XA25 produces 50 watts into 4ohm at .01% distortion in pure class A and has reserves to go much further. Most amplifiers are at 1% distortion at their rated power.
It's a 10 to 1 ratio with wattage anyway. It takes 1000w to effectively double the output of 100w amplifier in spl. So even with 50w you need 500w just to double the perceived spl. At least that's how it's been explained to me. Please correct me if I am wrong. All that being said, the Parasound pairs nicely with Tekton. Eric loves pairing them together at shows and events. You really can't go wrong with them.