I wouldn't want to put you off from buying it - but as I've mentioned elsewhere... my mate bought the same plasma (hitachi 6600) and even though he claims he had turned the settings down to well below 50%, taken it out of dynamic mode, within 4 days his screen had a channel logo (Zee TV , asian channel) burnt in the top corner.
I had the same plasma on order and as you will see in the Hitachi 6600 threads, I was one of the first to compliment what I thought was superb picture quality on the Hitachi - to my mind, with Freeview, it's every bit as good as plasmas i've seen worth upto £1000 more... that's how I impressed I was with the PQ, that I ordered it at Currys on the spot - but, after seeing the screen burn on my mate's 6600 -- I had no hesitation in cancelling it... it's not a risk I was willing to take... from what my mate says, they only had Zee TV on for abt 3 hrs per day, but somehow the logo just got stuck permanently!
I've been to see him again this week and taken another look at his plasma, while the screen burn has faded away a little - it still looks pretty ugly and has ruined what is otherwise superb picture quality.
As a result of what happened, my mate's taken off the Sky Digibox and connected it back to his old CRT upstairs... he's only using the plasma for watching DVDs now (that too with black bars removed, even if it means zooming in and cropping a bit of the picture off).. and he's taken the settings down so low that the picture has lost the clarity and vibrant colours that made it such an attractive screen when I saw it at the store...
He's so fed up with the whole thing that he's just hoping the screen burn gradually fades away within a few weeks under these settings and watching only DVDs , and he'll eventually put it for sale for about a grand... and then perhaps get an LCD or something..
What should have been a pleasant experience for him by purchasing this plasma has turned into a nightmare..