Here I go speculating again (it's a bad habit you know), but I blieve that if you have an Atmasphere or CAT, and any of the switching amps (as good as they are, and they are quite good) for 3 weeks of audition on your Sound Labs you will find yourself willing to put up with the heat, the warm up, the hassel, the expense, the pain, etc., due to the more immediate and palpable soundfield that will emanate from you panels. Call it body, richness, bloom or whatever but, the excitment and "you are there" experience is arresting.
Here is something to consider; most, if not all, switching amplifiers being mentioned in this thread are available from the vendor for audition with a full money back guarantee. It's a sign of confidence in their products and, a credit to the manufacturers offering this policy. You have one of the best speakers on the market. Go to the trouble of finding the one that makes hay in your system. You will ultimately be far happier. Every one wants to be on easy street and live the simple life but, the life of an audiophile was never meant to be easy.