Power amplifier advice?

@llg98ljk wrote:

No amp is ever "overkill" in the sense that it will overwhelm your speakers. Better to have too much power loafing along, cool and clean than too little, clipping and frying your speakers.

Yes, exactly.

Also, an inadequate amp should have the good grace to fry itself, not the speakers. It’s not the speakers’ fault if the amp can’t cut it.

I think I owned the Parasound A21+ (not the A21). I liked that amp a lot and it got me buying and selling a lot of amp brands.

The Parasound A21+ is thicker on top than say the Schiit Wotan. Both are equally powerful. Given the brighter edge of the NHT 2.5 the Parsound maybe even a better match than the Wotan. Though I would get the Wotan on a home trial to check out the hype.

Great speakers will sound better than average speakers driven by a great amp.  I used to buy average speakers, and then trade up, and then trade up, and then trade up...  Finally, had enough, bought great speakers and enjoy them still to this day. 
Secondly, 200 wpc, wow, the choices are huge.  Inexpensive, new will likely be Class D amps.  Lots of people making and selling Class D amps based on Hypex or Eigentakt modules.  One place in Canada is RCVTech, who were advertising new 250wpc monoblocks for $1600 a pair. Hypex Cores.  Buckeye amps in the States with Eigentakt modules. I have no affiliation to either. NAD uses Eigentakt modules in some of their product. I believe Rotel does too. 

Buckeye Amps. You will not find better bang for buck anywhere in the market. And the service is top shelf.

I'd go for two Quad QMP's. Great and very steady power amps. Own them myself and running them with refurbished Final ESL's 1.4. The QMP's are unconditionally stable and drive any speaker.

From 'Audio Technology Factory' (https://www.technologyfactory.eu/en/quad/quad-elite-qmp/a-7312-138):

The QMP Mono Power Amplifier is a by-product of the earlier 909 Mono with enhancements distinctly noticeable in amplifier construction and circuitry, and is capable of producing an accurately balanced XLR. Moreover, the new Elite QMP now incorporates a ‘current dumping’ feature allowing for a cleaner, more versatile performance. The QMP Amplifier is a bridged mono bloc version of the QUAD QSP Stereo Power Amplifier and can be used used in conjunction with it. Current Dumping - The QMP Amplifier incorporates QUAD's patented current dumping technology developed by QUAD's founder Peter Walker, and is one of the finest audio amplifiers available. One of the few truly innovative amplifier topologies, it is essentially a combination of two amplifiers to give the best of both in each channel. The current dumping circuit like the Quad QMP Amplifier consists of a very high quality class A low-power amp which provides the details of the signal, while a high-power current dumping section provides the grip to keep the speakers under control. These two amplifier circuits are combined with a precision network to perfectly impose the finesse of the class A output onto the power of the current dumper. This technology eliminates the problems of crossover distortion, quiescent current adjustment, thermal tracking and transistor matching. There are no internal adjustments or alignments and the choice of power transistor types is less restrictive.

Specification

- Design Philosophy and Core Technology: Current Dumping

- Output Power: 260W RMS, 8Ω

- Gain: 33dB

- Frequency Response: 10Hz – 50kHz (+/-1dB)

- Total Harmonic Distortion: ‹0.005% at 100W, 1kHz, 0.05% at 70W, 20kHz

- Signal to Noise Ratio: >105dB (20Hz – 20kHz)

- Input Sensitivity (RCA): 845mV (for max output)

- Input Impedance (RCA): 15kΩ

- AMPBUS Input: AMPBUS / XLR

- AMPBUS Input Sensitivity: 2.0V (for max output)

- AMPBUS Input Impedance: 10kΩ

- Main Power On/Off Switch: Yes

- Dimensions (H x W x D): 184 x 319 x 312 mm

- Weight: N/A

- Finish: Black