I personally like my 42" Samsung. You will definitely want to use HDMI on the PS3 to achieve 1080p.
Be very careful and look at the detailed spec's... When I bought mine it was advertised as "HD Ready" which is totally different to true 1080p.
Mine basically upscales and the native res is only 1024x768 with it being an older 4series samsung plasma. Which sucks when using it for my HTPC.