Hi all. Anybody rated the 42PX600 against the older 42PV500? I bought the PV500 12 months ago and have to say I have never really been impressed with it. DVD's are spot-on but everyday viewing via SKY ahs always been abit suspect, picture fragmenting etc. There's seems to be so many good reviews on here for the PX600, just wondered if it is deemed better that the PV500?