There are a couple of things to consider, IMO. If you want to try and use a constant height screen so that you can zoom out on 2.35:1 aspect ratio movies, then it is very key to get the exact spot to mount the PJ. If you're using 16:9 screen, then that is less important. If you plan to watch any low quality sources, i.e. cable of VHS tapes, then being able to zoom in might be useful, as the picture flaws could be minimized. Lastly, I know the HS20 is much quieter than my HS10, but since it vents out the front having those vents in front of you instead of behind you can reduce the noise you do hear from it.
I ended up moving my HS10 mounting location 3 or 4 times as I went through various configurations. Fortunately I have a suspended ceiling and a DIY mount that made that fairly easy.
I ended up moving my HS10 mounting location 3 or 4 times as I went through various configurations. Fortunately I have a suspended ceiling and a DIY mount that made that fairly easy.