I have 'isolated' the BDP-2 from the network by using a fibre optic ethernet link to connect it to my network, and use batteries to power the fibre converters.
Really... do you find that reduces electrical noise into the BDP-2? There are some folks on the MinimServer forum that are pretty excited about the Melco NAS that does something similar with optically isolated ethernet ports.
Personally, I use an Apple Airport Express in bridge mode to isolate my BDP-1 from physical connections with other devices; works great, but was done for convenience, as my router is a ways away from my BDP-1. Airport bridge into 100Mbps has no trouble keeping up with 192kHz / 24-bit tracks transcoded to WAV/24 and sent via the network.
On the previous topic, I've gone back to experimenting with MinimServer and MinimStreamer, serving the BDP-1 with the DLNA client enabled (GMediaRender). Flawless playback with gapless tracks, et al., but I had to setup MinimStreamer to transcode ALAC and AAC (MP4) files to WAV/24, in-line, using SoX; AAC files were completely hanging during playback and high-res ALAC files had some difficulties playing. I've left MP3 files to playback natively. I can scrub back and forth, play, pause with not even slightest glitch on gapless tracks.
I am also happy to see that the BDP-1's CPU usage is very low (hovering around 6%) with the transcoded WAV/24 files and the system sounds good.
I wish the track title and artist would show up in the little window, and the front panel buttons don't do anything, but otherwise things work well with the BDP-1 as a DLNA renderer.