hi i have the sonykdl40w4500 and suffer from motion blur problems too its been an issue of mine since last year when i bought 2 other sony lcd,s that being the 1st, kdl40t3500 which woz like jelly on the screen,then i bought the kdl40x3500 which wasnt much bettter with motionflow although a great picture it still wasnt good enough, so then i moved onto the w4500 which in all fairness is alot better but not perfect, i use mine alot for ps3 which if you are a console owner you will probably notice motion blur on certain games, this too has been abit dissapointing for me so ive been tempted by the z4500 with its 200hz motionflow which i thought would be great till you posted your problem about motionflow.
have u got your motionflow on max? do you use game mode? are you satisfied with the z4500 or has it been abit of a dissapointment for you?