Right, I bought a BenQ EW2730V 27" LED screen. I read good reviews about it having good colour reproduction, black levels and a decent response time. Now for reference, I currently use an Acer 26" MVA panel LCD.
Problem is the first unit I got had really bad smearing/ghosting on coloured/grey backgrounds. If you move a white block on a black background or black block on white it seems OK (although not great) but as soon as you put anything on a grey or coloured background you get smearing/ghosting as bad as anything I've seen. It's like it's got a 50ms+ response time.
I had an exchange of the unit today, but have exactly the same problem. I have noted that the replacement unit has the same manufacturing date as my first one and is only 3 digits different in serial number, so I'm thinking batch fault?
Anyway, none of the reviews I've read have said anything worse than "slight inverse ghosting", nothing approaching the severe smearing & blurring I'm seeing.
Linked is a video taken from my mobile @ 720p (sorry for the crap quality). I put my old Acer and new BenQ side by side, both on DVI connections. Look at the DS9 pylons on the Star Trek Online Launcher, it's not as obvious as viewing it directly but you should be able to see the smearing I'm on about.
I recommend watching at 720p and full screen.
Currently downloading a samsung smearing test video just to get something clearer to test on.