I did a little poking around online (using my phone, so it wasn't the most exhaustive search). I was surprised to learn that DLNA is actually a few years older than UPnP. It seems that most DLNA servers also work with UPnP devices. I also was able to confirm that the Panasonic's BD75 supports DLNA, although you would never know it from their company site.

Something to consider - support for DLNA or UPnP doesn't mean a device will support your file types. Some servers will transcode on the fly, which can help, but you can still be limited by what formats the server will transcode and what formats the device will accept.