I have the TX10, and while I agree with you that the aesthetics of the camera is unrivaled in the waterproof category (IMO) and the picture quality is great, I don't agree with you that the camera is "fast" or "responsive". I've found that it takes several seconds to start up and take pictures, (unlike your model which "powered on quickly") and to switch from mode-to-mode. Plus, when I end up struggling with the touchscreen, that is definitely not "fast" or "responsive". Also, the screen is so flush with the edges, that scratching the screen is easy and inevitable.
However, I agree with you that I like the fact that it slips in my pocket so easily, and that it surprises all my friends when I tell them it's waterproof (because it definitely doesn't look chunky enough to be in that class)
I've never had the other cameras in this review so I can't compare, but I can't recommend the Sony to any of my friends because of the problems I noted above...IMO, it's only "good enough".