I looking at upgrading to the SIM2 HT 200, Are there any members who have one and if so, are you happy with the performance? My room dimensions are 7FT 4" x 26FT. Also, what screen would you recommend fot it (size & spec) please? Lastly, do you notice the "rainbow effect" on the screen? I saw a demo today and I noticed the flashes of "rainbow" effect occasionaly. Otherwise, I'm really impressed with the picture quality.