To me 720p p= progressive is better than 1080i,forgot what the "i" means.....either way the "p" is better,so 720p is better,for me,not everyone else.
Some of it is what your TV can do too. If you disable display discovery on xbox dashboard it opens up more resolutions,but your TV/monitor as to be able to do that...but the options there.
My TV for example will not do 1080p only 1080i. Like i said the "p" is much better,it's smother and cuts down picture splitting etc.
Anyway,in a nutshell....720p is fine for me :thumbsup:
The "i" is for interlaced. It only refreshes half of the screen at a single time. This makes the quality of the picture lower then if it was to be refreshed all at the same time such as 1080p.