hi bullit , im sure the 4500 is great when working correctly , ive seen them and they do look very good , but some of them do have clouding issues , do a google search ( clouding issues with sony kdl40w4500 ) and see for yourself , and maybe a proper calibration does help , but ive read many posts on forums like this , where people vent there frustraion with sony , who , on the whole say the clouding is not a problem , read those and make an informed choice , what hifi received sets for reviews with none of the clouding issues , and thats fair enough , buy lots of people didnt , and thats a gamble i wouldnt take ... regarding the panasonics , they are brilliant in my opinion , the one i have can be got for as little as £800 , a great bargain i think , but with the 46pz81 you get freesat and better contrast ratio 3 hdmi ports and better sound , intelligent frame creation ( which a lot of reveiwers say they prefer switched off ) ,, the pz85 doesnt have freesat but has even better sound again , and the other xtras the pz81 has too , anyway in my opinion the plasmas have a more lifelike picture , and is better with movies and sport , but thats a personal choice ... have a good look around and see what you like , hope this is some help ....