Just seeking some advice! Who out there in tPF-land uses them for work or school? Any recommendations for brands or resolution or picture quality? What I can expect to spend for decent quality? Are they easy to hook up to a PC or do you need a laptop? Are they all Mac-compatible (thinking about getting a macbook later) or do you need adaptors? What about wireless capability? I would use it mostly for powerpoint presentations in the classroom, but if I could use it to show DVDs, that'd be great too! Thanks for your help everyone!