I just used an $80 Micca EP250 via Ethernet & HDMI. The menus don't look very nice. They look basic and simple like desktop icons/folders. But I streamed full 40GB BD ISO files from my 30TB NAS perfectly and got 1080p & Dolby TrueHD & DTS-HD MA. It also plays all MKV, MP4, AVI, and every single video format.
The ISO disc menus don't always work. Most of the time it seems to work, but on some movies (Spartacus Season 4) I cannot get the menu at all. So I had to rip just the title, instead of full disc.
But on some BD full disc ISO like Life, Earth Biography, Dave Mathews & Tim Reynolds Live at Radio City Hall, etc., the menus worked fine.