I can't comment on the picture quality of this TV, although as you say, it does get very good reviews. The only thing I would say however, is that this particular model doesn't have an HDMI connection and I think this is becoming more important.
Panasonic do another model the TX26LXD600, I 'think' this has a slightly higher spec and it does have two HDMI connections. It's also dearer but should still be within your budget.
I'm not sure about this but doesn't the PS3 have an HDMI connection? If so, with a quality lead this will probably give you the best picture quality.
I'm also fairly sure that HD and Upscaling DVD players require HDMI in order to acheive the best picture quality?
Just my two penneth....