I recently moved to New York for my new job, and I am curious on what sorts of projectors should I buy in order to best help me practice for my PowerPoint presentation. I have been doing some research and found that pico projectors are fairly inexpensive and are great/convenient to help me practice. My friend told me that AAXA, Acer, Optoma are all good brands for pico projectors. I was wondering what projector would help me best practice with my presentations. Budgets: $200-$400.