Erm Op have you actually compared each of these sets with different types of footage, Ie. sky, inbuilt freeview, upscaled dvd, blu, gaming, HTPC use, as it seems you are just quoting things from reviews, and also making comments that mean nothing regarding picure quality.
Not trying to be harsh, but it reminds me of a thread on the GTR forum where a guy who had played lots of Gran turismo decided to tell people the correct way of driving round the nurbergring circuit without ever haveing driven a GTR, let alone driven around the circuit.
I suggest having a good read up on the technologies and what everything means, sharpness isn't that important considering most tvs have their default sharpness cranked up, and it looks horrible. Also you mentioned that the sony is great because it can look like a picture. Not really a major point at all, just some fancy trick programmed in as an afterthought.
Picture quality is also made up from more than just 1080 pixels, you have the black level and the shadow details produced in the darker areas. No point in having super black blacks if there is no detail. Then you have the white levels, combined with the blacks to give the overall dynamic range of the image which creates better depth if the range is greater. Then you also have the number of pixels I.e. 720p vs 1080p which is a minor point unless you sit close to the set. Then you have the colour accuracy, greyscale calibration settings, picture processing options, and the ability or not to properly output a 24fps signal.
-1 Offtopic.
Yes, It seems many people are coming round to plasmas 'being better' than LCDs, (largely due I believe to decent plasmas hitting the 5-600 mark), but LCDs are still cheaper, and you can't get 32 inch plasmas, and LCD are still better for certain things. (PC Viewing, text, perhaps certain gaming scenarios)
You can get a 32 plasma

LG PG6000, very good picture, but the IR is quite bad, although it was a brand new set that I was tinkering with.
Totally agree with you that LCDs are better for some things (your examples)with plasmas having their upsides. One thing I do prefer on plasmas is console gaming as they do handle motion better whatever tech the LCD compared to it has, and the absence of input lag. But then if someone ueses the screen solely for gaming a plasma will suffer IR, that's where LCDs do take away the worry on a pure gaming/PC type screen.