We had a chance to test and compare two models: ViewSonic M1 vs Optoma HD243X and this review should help people who are looking for a good projector. Based on our rating, M1 has a total rating of 5.3 out of 10 versus 7.3 for HD243X.
Advantages ViewSonic M1 over Optoma HD243X
Lower power consumption, 55 W vs 300 W
Longer lamp life (normal mode): 30000 vs 3500 hours
Stereo sound vs mono from integrated speakers
Advantages Optoma HD243X over ViewSonic M1
Bigger projection screen size: 28-301 inch vs 24-100 inch