I also suggest avsforum. If you create a thread there with this question, you'll get much-better-informed responses. With your budget, you can ignore 4k projectors. They're way out of your price range right now. Wait a couple years for that. Best you could do in that direction right now is an Epson ls10000 (laser projector) for about $4k used, and it's only 'faux-k' anyway. If you've never had a dedicated theater before, take your time. Build the room before you buy a projector. Room size, throw distance, screen size, seating distance, etc. all come into play. You'll need space in the budget for receiver, speakers, screen, etc. If you can swing it, I recommend a 2.35 screen and an anamorphic lens.