Crystalizer is not actually like a jet effect. Its effect is generally hardly visible [after 1.04, you can compare it with a Sony's flat sound, there wont be a huge difference], so it must not be compared with BBE - Mach3Bass or Clear Bass.
Creative players are always good sounding players, and I can say that Zen X-Fi is the best sounding player of Creative [less powerful than Zen Vision:M and Touch, but better sound signature].
I love the Sony sound. But, in fact, I can say that there is not a huge difference between these players. Yes, if you like enhancements, if you like to use an EQ and jet effects, then a Sony or a Cowon may be the best choice [Vibez is still better IMO
] but their unprocessed sounds are not "that" different [moreover; Cowon's unprocessed sound is worse than Creative in my opinion].
Creative may deserve that critisizing, because they never listen the requests of consumers, but I think their players are not worse that the other top players. Zen X-Fi has two drawbacks- SD card integration issue and no lossless support [Sony is not different]. On the other hand, I like Creative interface which, for instance, allows on the go playlisting and deleting [my A818 makes me crazy with its stupid options]...