Yes, so as far as Advance Paris Amplifiers go, particularly with the A12 Classic and A12 APEX, I happen to own both, and can comment on the Build Quality of them both.
Most of the Build quality issues that are a bit less than "stellar", are from the Dial Knobs and the Remote Control. They are not the "heavy duty" style Knobs, as such that you would be familiar with say from a Luxman Amp or other units.
The Remote controls in terms of Build quality, Feel and Weight are also not as great as what one would hope, but otherwise they function just fine and have a very good layout on them.
The only last other thing I would say in terms of build quality issues, is that the RCA connections on the back of the A12 Classic, have a little more "give" then one would expect, however I noticed that this has been immensely improved on the APEX 12, as they are much tighter. It’s not the biggest deal or a problem, but just something to be aware of especially if you are known to push your connectors in hard and fast, I recommend going slow and gentle, particularly on the Classic Units.
The A12 series are definitely superior to the A10 models because they have Dual Toroidal Transformers and True Ultimate Mono Amplifier Separation.
The VU Meters have different scaling and have "White" Background LED lighting as on the APEX Model, whereas the VU Scheme for the Classic Model is Blue.
The APEX Model has a much better DAC and also is supposed to have much better capacitors and components overall. It is a very nice unit and I love mine.
I’m very particular when it comes to Amplifiers, and so outside of Advance Paris, I really look more towards brands such as Luxman or Audio Research.
But for the options and vast connections you get in the Advance Paris, including the Sound quality, it’s absolutely amazing for the value.
I use the Advance Parix A12 APEX to power the Revival Audio Atalante 7 Evo Speakers, and they are a very majestic match.
Advance Paris would definitely be a great Amplifier for speakers like anything from Wharfedale, KLH, Spendor or Klipsch, so the Wharfedale Lintons would really go great with them in my view.
The main difference if you go with Luxman, is you get Less Options, but absolute Premium Build Quality, and it would probably even outlive you. Luxman also has much better service for their equipment as well, so it comes with the price tag.