Component recommendations for Wilson Audio Alexx

hi forum - i'm especially interested in opinions from fellow Wilson Audio Alexx owners on this topic.

I took delivery of my Alexx a couple months ago and am looking at upgrading my streamer/DAC and pre-amp. I feel all set on my amp, which is a Soulution 710 and my cabling, which is purist audio for speaker cables and XLR interconnects. I only listen via streaming and use Tidal hifi, which has masters/mqa, so would prefer a DAC that could support that.

my main dilemma is while my local dealer is fantastic, they carry a relatively narrow range (at the upper end) for streamer/DAC and pre-amp. Their main lines for streamer/DAC are dCS and Linn. I think they also carry Naim but to be honest it's never in the reference room for some reason. In the pre-amp space, it is ARC and D'Agostino. I have read lots of reviews on MSB, CH Precision, Aurender, Lampizator on the DAC side and Soulution, CH, ARC, Kondo on the preamp side, but it's very difficult to actually demo any of these brands.

On the specific questions, I'd love input from other Alexx owners on 1) what setup you've landed on for your digital source and preamp, and 2) what options did you explore (or have) and decide against?

Budget is not a big deal, but if it gets spend-y I look at the pre-owned market first for electronics.

Thanks forum!
DCS is the best for digital front end. Boulder or Ayre for electronics, or AR if you want tubes. I wanted to like CH Precision. It definitely is not in the same league sonically. I laugh when I see things like Lampizator - the unintended consequences of the internet.
@mtdining What about Spectral electronics and Wilson speakers? 
@kantian22 Spectral SV is very special and very similar to Soulution (very low distortion) 
@kantian22 Also consider the Solution 560/760 DAC to match your amp.  Gives you the pre-amp functionality to drive your 710.  
thanks again @georgehifi  for the suggestion and 1st hand experience with that setup. i do acknowledge @4425 point, but baselining the listening with dac/streamer direct to amp and then testing the pre-amp integration would sort this.

@mdp632 spectral has come up a few times in my research, but I haven't given it serious consideration. i'll take a closer local dealers in my area (that i'm aware of), which can make it bit of a pain. On Soulution, i've gotten mixed reviews even from Soulution dealers on the DAC, at least when compared to MSB or dCS. 

@charles1dad  - thanks - that was my read, too, which is why not even acknowledging the response without more clarity on intent :)

seems the outcome is definitely MSB and dCS should be in the top 3 for a "listen off" and maybe a 3rd brand. i like the idea of direct to amp and then bring in pre-amp...that seems surest way to ensure money best spent and can also assess impact on sonic performance step-by-step.

thanks forum!