I purchased the Motion Computing LE1700 tablets about 9 months ago and they have worked out well. It is nice hardware and has all the interfaces you could imagine. They are 12" screens (so a bit larger than most EFBs) but I prefer not squinting at tiny little 8 or 9" screens. We have a $40 bluetooth GPS receiver that sends the GPS data to the tablets so we see our position on either Google Earth or FlightDeck which is really convenient.

I believe most of the aviation-specific tablets marketed as EFBs are overpriced to say the least. The Fujitsus and Motions do the same thing for less money because they don't say "aviation" on them; they are typical consumer PCs. We bought two of these things with SSD drives for the total of $7000. And they DO comply with Part 135 requirements and can be added to Ops Specs if need be.

Personally I wish Jepp would make a version of JeppView/FlightDeck for the Mac so I could ditch any versions of Windows, but until then...

These units came with Vista Business and can be downgraded to XP. It is funny because XP under virtualization on my Mac runs better than Vista natively on these tablets. I had never experienced problems with Jepp under XP but have had several crashes of the software under Vista.

So I would recommend using XP if you can.