I have the 37" and i must say its fantastic. Sky+ SD is brilliant my xbox 360 is brilliant through HD, I cannot fault it. I watched a SD starwars dvd on my 360 the other day and a friend thought it was in HD.
I have had none of the problems with motion blur / blacks etc.
To my untrained eye anyway it looks good and everyone else who has watched it were impressed.
I read somewhere that these are totally new panels developed by Sharp and Toshiba with the pixel plus technology taken from the higher spec models.
I hope this helps