One of the earlier posters in this thread who commented on the GMA 240 is sharing out of date information. While it is true that early models of the GMA 240 would, in very rare cases, blow an internal fuse, this circuit protection was revised in early 2013 and there have been NO reports of issues since then. In the unlikely event that anyone with any GMA 240 has any issues with this circuit protection, please contact us and we will take care of the repair.
I think it's no secret that, year after year, PS panels have been the best performers. But many buyers seem more concerned with looks than performance, and Garmin panels match the looks of other Garmin equipment. Note the OP only asked about Garmin. This thinking baffles me, but that's just me.