Two other terrific integrateds you could consider if you're prepared to stretch would be a Simaudio 700i & Boulder 865 @ around 12k.
In regard to Class A vs Class AB integrated amps, solid state Class A integrateds won't have enough power to drive your Quads, so it's not really worth discussing. Class A/B amps can sound linear and very good if there are a good number of watts in Class A & the designer was successful in notching out any audible crossover distortion. I know that Boulder go to great efforts to notch out crossover distortion & their measured linearity suggests that is so. Edgar Kramer reviewed the 865 for AVHub including a comprehensive lab report which is worth a read.
Ayon Audio build their top ranging gear in Austria which is terrific (eg: CD-2s, CD-5s), however the Triton (and lower range gear) are made in thier factory in Hong Kong with Taiwanese-assembled boards. Have a look at these two links which confirm this -
(Preamble: If the US Ayon Distributor is trolling AG for negative commentary on Ayon components as usual. Don't shoot the messenger. I did NOT write these reviews)..
http://www.highfidelity.pl/@main-212&lang=en
http://highfidelity.pl/@main-215&lang=en