Hey (sry for my english)
what would help is to know what you want to do with it?
if you are doing mapping with madmapper and quartz composer, my opinion is that the resolution is not the first thing to look at
i would recommend you to look for the Beamer contrast and black level,
and then on the resolution....
because the most compsotion are not made in high resolution and if the beamer has a bad black level you will see where are the not mapped part of the beamer and i hate this, it looks cheap!