After reading about the vertical banding on the Z2 and PT-AE500 the HS20 seems like the only choice. After spending the day moving my room around Ive found a layout were the long throw wont be a problem. Theres just one issue remaining before I ordered that I was hoping HS20 or HS10 owners could help me with could I put the projector upside down on a flat surface? Ive never seen a HS10 or HS20 but from the pictures the top looks slightly curved, so I thought I best check before I bought it. The reason I want to do this is because I like my head to be position directly in line with the centre of the screen so I dont have to strain my neck looking up. I have the projector behind me just above my head so I need the image to be projecting down. With the PT-AE100 the position of the lens roughly lines up with the bottom of the projected image if you have it the right way up. If you turn it upside down the position of the lens lines up with the top of the image and it projects downwards which works out great. Can I achieve the same thing with a HS20 and will there be any problems putting it upside down? Thanks a lot for your help.