I've used both Astron and Motorola power supplies for different radios over the years. Both have worked well for my radio applications. I'm sure others will chime in here as well, but I feel that it's money well spent if you get a high quality power supply.
Ken, if you are in the Portland metro area, look me up... I've got a mxt115 and a mxt400 if you want to try them out... Also in the process of getting my Moto 1225 repeater up... It's located in East Portland. Ryan wrja757