[ant_thomas]

Hello mpw, that is sad to hear, unfortunately I do not have a J1800N-D2H myself but I can share my experience with the Q1900-ITX.

I've been using my Q1900-ITX for few days now and haven't had a single issue. Everything worked basically out of the box. Took the mobo, installed it into the case, plugged all the cables, some old 1.5V DDR3 ram, hdd and a flash drive with XBMCbuntu installer. Everything took less than 1 hour. Did not even have to install any special drivers nor do anything with the BIOS. Both Ubuntu and XBMC runs flawlessly with the CPU load while playing a true (40gb+) blue ray off an external HDD never going above 10%.
I've even tried running Windows 7 64bit which installed without any hiccups and ran perfectly as well.
Browsing youtube and watching 1080p videos did not put any noticeable stress on the CPU too. All videos played smoothly both on Ubuntu and on Windows 7
Both HDMI and VGA work just fine. HDMI is connected to my TV and a projector to VGA.

So far I'm really happy with my purchase especially since the price of Q1900-ITX (I paid 66 EUR / 90 USD) is really good compared to other BayTrails that have J1900.

However, I can not test the consumption of watts since I do not have any tools for that apart the simple multimeter.

EDIT: Also, loving the S/PDIF out on the mobo for my speakers. It worked out of the box too, just connected the speakers and changed the audio input in the XBMC.

I'm looking at the Q1900-ITX - where did you get yours for 66 EUR?