The larger the screen the more 1080p comes into play. Anything over 46" I think I would go with 1080p, anything smaller you may not notice a difference, so the experts say.
There are too many other variables that affect picture quality, most of which are more significant than a set's native resolution. Find the set that looks best to you at your normal viewing distance.
With my 60 inch set 1080p blu-ray is stunning, the same picture does not look nearly as nice as it does on my 720p 42 inch plasma, but then again part of that could be that the Pioneer has a better PQ than my Toshiba.
