Firstly, apologies for my short rather basic question and thanks for all the answers. I have been using Sony SXRD projectors for approx. 6 years. Currently using a VPL-HW65ES for the last 3 years as the previous model was replaced under warranty just before the end of the 3 year warranty due to an issue with the prism causing unacceptable colour non-uniformity.
I have found the SXRD technology delivers a good quality image but, as has been the case with my two previous Epson PJ's, colour non-uniformity seems to develop over time as the PJ ages and (at least to me) becomes very not