The existence of good (great) products without THX certification is not "proof" that certification is overrated or that it doesn't mean much. What is your reasoning behind why you feel THX certification doesn't mean much? Certainly M&K (and others) must feel it means something, otherwise, why...
Really? I guess M&K, Atlantic Tech, and the Klipsch Ultra2 sets are all overrated, huh? You might tell all the post production studios how overrated it is that their M&K monitors are THX certified, and how it doesn't mean much. Look, I would never say you should get a speaker just because...
There is a difference between THX Ultra (the original spec, when there was only one), THX Select (what the Crystal speakers are), and THX Ultra2 (the updated original spec). One of the main differences between Select and Ultra(2) is a reduced requirement for controlled vertical dispersion...