I should be getting my first PJ next month and have decided upon the ae500. However, it will not be ceiling mounted and I have calculated (using einsteins theory of sitting height, PJ height and distance from screen etc) that an approx keystone of 5 degrees verticle would be necessary. would anyone with experience in this department let me know if picture degradation would be dramatic? If so Argos sell plenty of slender telephone tables at various heights so it would not be the end of the world!! It would simply mean I couldn't sit in my usual (ideal) location as the PJ would partially obstruct the veiw of the picture. Thanks for any responses, Pete.