Weiss 204 Dac or LTA Audio Aero Dac as an upgrade from Chord Qutest Dac

I agree with bgross but from the other pole. The Weiss’ neutrality worked wonderfully with Harbeth 40.2 speakers. My system with Harbeth, tubed pre and neutral SS amp, allowed all the detail and neutrality to shine through, without highs being too much at all. This also allowed that nice ‘wetness’ quality, so to speak, within its musicality to work quite well. 
I would think the Weiss might be an upgrade in the same lane as the Chord and the LTA may be like an upgrade from a different lane, i.e. LTA may be more different than Weiss and Chord. 

I returned my Qutest and got the Weiss 204 and its much better - for my system; McIntosh 352 tube amp and Revel Studio speakers

Th LAIV Harmony DAC $2700 US.......bests every DAC mentioned here except the Lampizator. IMHO

The Qutest LPS question peaked my interest. I texted my local store (Audio Advice) asking if he (Jon, the store mgr) recommended the iFi power elite for my Qutest (as they sold the power elite), thinking I would order one.  

Jon didn’t, but recommended the Sbooster with the MKII upgrade from upscale audio. To recommend a product you don’t sell is impressive but also demonstrates the Sbooster to a significantly better choice based upon the experience of his customers. 

I am ordering one for my Qutest. 

He stated: “I have customers that did those (Sbooster + upgrade), huge difference”

“I’ve tried both and the Sbooster is by far the way to go…. Sorry wish I did sell it, but rather you be happy than sell you the wrong product”