I'm helping my mom put together a home theater setup, and need a little advice. We're looking at projectors, but I know little to nothing about them... so I'd like a little input. 1. Brand/Model recommendations 2. What is an acceptable lumen rating? (definitely want bright and vibrant!) 3. Screen recommendations 4. What's important to look for in a screen? 5. Any other tips... Thanks in advance for any input!