Unfortunately, my ION is running at 80% with xine-player (see earlier reply) which is why I am "what the heck" because I can't see why I would have an issue with the Core/Hybrid in the first place because it has the "POWER" (desktop unit, faster CPU, etc., etc.).
I'm also at a loss why the ION and DE7000 can setup 9000 mtu speeds and the Core/Hybrid (both ethX) craps out above 7000 MTU. I tried 8000 as the next setting but it was a no go. (Does this have something to do with having to swap network interfaces?.)
So my next head scratcher was what happens with iperf and transmission speeds over the network @ various MTU setttings using a test VOB (the same VOB, over and over and over and over) from my NAS to the Core/Hybrid, Acer 330 ION and DE7000!