Me? If you NEED the power, don't wimp out. Get an electrical guy out to drop a 20 amp line. Apartment guys probably can't make use of even a FRACTION of a kilowatt without being offensive to ALL the neighbors.
If speakers can be Bi-Amped? Maybe a stereo amp EACH. My panels are running 2x200 per and at the crossover of 600hz, near enough to the 50:50 power point to be a pretty even draw on EACH amp.
One day, I'd like to measure LINE VOLTAGE as I turned it up. A drop of 3% or 4% would be a red flag. Maybe a 150amp service TO the house and upgrade the wires TO the dedicated amp circuit to 10ga.
Magnepan MG1.6qr HSU Research VTF-2 MK3 2x Parasound A23 Parasound P5 Cambridge Audio DACMagic Plus Sony PS3 x4 @3foot runs of 10ga Belden speaker wire. GRADO SR80e on-ear headphones iMac as music server (2009) Panamax 5510 w/) ISO transformer LG 65" B6 OLED display
The XPR-1 is a unique amplifier as is the XPA-1. Both suited optimally for their given task. Make the music dynamic and pure with a sense of scale, detail effortlessly. Both would be incredible. I know the XPA-1 way more than the XPR-1. If you are looking for amazing finesse, you can't beat the XPA-1. It has been my favorite for a long time. The XPR-1 is extension of what was learned and what is possible when you scale things up quite a bit.
I had heard many powerful expensive amplifiers that equal the XPA-1, but they were allot more money. You are going to find the XPR-1 amps doing the same thing except even more so. How much more over an XPA-1 is dependent on you and your system. Either way, you can expect one amazing ride.