Thanks to everyone who's sharing their rack / platform / isolators choices and advices, very valuable input indeed!
Of course, I would ideally like to put the Extreme in the very best conditions to deploy its powers, but in the short term I simply do not have the budget to go with top tier mechanical interfacing gear.
As
@Mike Lavigne was noting, I listen to headphones only. Furthermore, I live in a very tranquil area (noise and traffic-wise), and I have a wooden floor. Based on my admittedly limited understanding of these topics, all this should produce a rather mild overall vibration energy level compared to typical 2 channel setups, arguably dominated by low-ish frequency content, at least when it comes to ground and airborne transmission.
Vibrations from the Extreme itself and micro-vibration produced by the other electronics of my system should be (again, experts please correct me if I am wrong) the ones to address, priority in that order.
Considering my budget and space constraints, WAF threats
and the input I have gathered from the replies from this amazing community, I am leaning towards one Daiza platform to start, to be put on the top shelf of my current rack (only shelf with sufficient space for the Extreme).
As an alternative I could invest all my residual budget on a more advanced rack (e.g. Quadraspire SVTL, Taoc XL, Neo Highend Quattron) and add the Daiza later.
Wooden shelves / black legs are mandatory, being orders from the house boss (you know who I am talking about).
Research continues, on this and many other subjects (who said 'cables'?) as I realize that getting the Extreme will raise the bar for all the other main and ancillary components of my system. Unless I win the lottery it will take me a few years to catch up, as my major upgrade cycle is just starting ...
Guess it will be fun!