There is no definitive answer, as the best projector for a 150 inch screen will vary depending on your individual needs and preferences. If you're looking for a short throw projector that doesn't need to be mounted, the Optoma GT1080 Darbee would be a great option. Alternatively, if you're in the market for a more traditional projector that can be mounted, the Epson PowerLite Home Cinema 148WS may be a better choice.