I don't know which is best. I suspect that various resolutions from D* may look a little better if the TV does the upscaling. That's how I have my HR24-500 set, with output to a HU8550, currently, after experimenting both ways. However, it does take a long time to switch channels -- part of what is going on there may be a bug in the D* system, since in switching from one 1080i channel to another 1080i channel, sometimes the D* box first tells the TV to switch to 720p mode, which takes a few seconds, then it tells the TV to switch from 720p mode to 1080i mode. That is, there are two unnecessary mode switches here.
Whatever you decide, be sure to coordinate with the settings on the D* box for Settings > Display > TV Resolutions. If you want the D* box to handle all upscaling, say here that 1080i is the only resolution your TV supports and turn off the Native setting. If you want the TV to handle all upscaling, say your TV supports all the resolutions listed and turn on Native. And you can get fancy and keep Native off but say your TV supports only 1080i and 1080p, for instance, to have the D* box handle all upscaling except going from 1080i to 1080p.
There is a theoretical argument for letting the TV do all the upscaling, because otherwise there will be double upscales, one by the D* box and another piled on top of that done by the TV.
Last edited by GregLee; 06-22-2014 at 08:24 AM.