Remember, you DATE your projector, you MARRY your screen! You might replace your projector in 5 or 7 years, but your investment in a good screen will last you 15-20 years or MORE!
If you are going to be watching sports a lot or having other activities going on in your man cave while the screen is in use, you should go with the ambient light rejecting screen! You DO NOT want to have a washed out picture if you are watching a ball game with the lights on! I recommend the "Black Diamond" or "Slate" screens from Screen Innovations. We have a Black Diamond in our showroom and I have a Slate screen at home...both are EXCELLENT at rejecting ambient light, and even in a room with a SKYLIGHT, I am able to use my projector in the middle of the day! WELL worth the money!