I am in the process of choosing a LCD or DLP projector for an art gallery and wanted to know if anyone had any problems with the manufacturer's swap out/loan warranties? I will be showing a film for 5 days a week, 8 hours per day for 8 weeks. Therefore in the event of projector failure I will require a loan replacement within 24-48 hours. At the moment I have a choice of 3 manufacturers; NEC, Mitsubishi and Optoma. Has anyone had any experience with any of these manufacturers and their loan machines and whether or not they have been able to produce replacements/loans at short notice? Many thanks in advance.