Amp Pairing for Aerial Acoustics 6Ts.

I now have a pair of Aerial Acoustic 6Ts in my living room. I'll include the specs below.

I do not know where to begin with matching these with an amp or an integrated. I've asked this question several times in other forums but probably too many with constraints. Thought I'd get some opinions in the Speakers forum.

Here is the intended use: Secondary system in my living room for casual fairly low volume listening via Sonos/Amazon Music. It will be used occasionally. Would prefer a small footprint. Simplicity would be nice. It will have no other inputs. Integrated probably makes the most sense.  It will have to integrate with Sonos somehow. I do have a Connect Gen2. Would not need a DAC unless the DAC as significantly better than the Sonos Connect DAC.

Considered so far: Sonos Amp. PS Audio Sprout100.

Would like to hear a range of opinions for units that would pair well with these really nice speakers. For now, let's say the budget is open (it is not) but I am willing to buy used.

Sorry for posing this question so many times and thanks for your input.

Speaker specs:

Frequency Response 35 Hz to 25 kHz ±2 dB, -6 dB at 30 Hz
Sensitivity 90 dB for 2.83 volts at 1 meter on axis
Impedance 4 ohms, 3 ohms minimum, low reactance
Power Requirements 25 watts minimum, >50 recommended
Woofers Dual 5.9″ (150 mm) with cast magnesium frames, special papyrus blend cone. copper pole sleeve, dual magnets, 1.25″ coil, long and linear Xmax
Midrange 4.8″ (123 mm) with cast magnesium frame, special papyrus blend cone. copper pole sleeve, dual magnets, 1.00″ copper clad aluminum coil
Tweeter 1″ (25 mm) with thick machined aluminum plate, soft ring-dome design with machined wave guide, dual-magnets, 1.00″ coil, copper pole sleeve
Crossover Fourth order acoustic Linkwitz-Riley, 600 Hz and 4,000 Hz crossover frequencies, 2 physically separate networks
Connections Four gold-plated binding posts with included jumpers, bi-wire and bi-amp capable
If you want an excellent sounding Class D amp - Hattor. 
So what about common brand units like the NAD 388? The specs say 150 watts into 8 ohms AND 4 ohms. Why is that? Is that a problem?

Should I avoid class D?

What about units like the Arcam SA30 or even the SA20? And what the heck is a class G amp?

Adjusted budget is around $2000....which is the most I've ever paid for any audio component. Most of my system components were inherited.
I do have a DEMO DIA-250. I could make you a good deal !
I also have a NAD Master series DEMO Amplifier.