The difference between the Criterion and the Precision is all in the frame and the price difference, in my opinion, is in line with the quality difference you get. Carada has good images showing the difference, but I am a big fan of the design of the Criterion frame. Keep in mind Carada WILL custom make a frame to the width you want/need for your specific setup so if you find that a size is just a bit to large, then they will make it that 'bit' smaller to fit your space. No extra cost, just pay for the larger size. I also always recommend the Brilliant White. It is their best material and is comparable to far more expensive brands including DaLite, Draper, and Stewart. No matter how bright your projector, that minimal gain will come in handy as the lamp ages, when you do 3D viewing, and when you have a couple of lights on. When the lights are off and you are in 'ideal' theater mode, then you should use a differently calibrated preset on your projector to cut light output down some. This should also help to improve overall performance. Keep in mind, it is the addition of light which is nearly impossible to get. Reducing light is pretty easy to do.