A couple of months ago i bought the Pioneer bd51 and at the time i was debating between that and the Sony s550.What i didnt realise at the time was that the Pioneer didnt do 720p and as my tv is hd ready i always preferred it to 1080i. Also the pioneer is very very sloooow with loading times especially blu. Ever since my purchase i keep looking at the sony and reading the reviews and am begining to think i made the wrong decision.Is the Pioneer that much of a superior product or would i not notice that much diference in picture quality between the two.Also i think the Sony is a far better looking machine.