Since its receipt, I've primarily projected against the wall, flat white, Princeton White I believe it's called. I also picked up a Danzian Matte White a few weeks ago. I'm not that enthused by it however. It DOES provide more depth (and therefore gives more of a 3-D image) than the wall, and that aspect of it is clearly noticeable. The problem (tradeoff) is that the image doesn't have quite the vibrancy of colors that the bare wall offers. Also, and perhaps more importantly for me, the Matte White lightened up the blacks, so they now seem more grey. Hence, here I go again on the Forum looking for the "optimal" solution.
In the Screen section there are some very informative reviews/comparisons of various screens, manufactured and DIY. Unfortunately, these comparisons were not done with a 300, and were "tested" with a certain amount of ambiant light.
I'm thinking about trying the Rust-oleum Silver and/or Aluminum spray. Perhaps someone has already done so and can report back.