I've actually got a CMT DMM-001 meter, how accurate is it compared to a lignomat I couldn't tell you but it seems to give some kind of reading of what I would expect from a piece. I'm only really after ball-park figures rather than dead on the money measurements so it works well for me (I think :?) and for around £35 it seems to be good value.
I dont have a moisture meter, and dont really see the need for most people. Surely the wood moisture content is irrelevant unless you have freshly chopped green wood and youre waiting for it to equalise?
If you buy wood, its at the level open air will give it. Put it in your shed and its the same. Work on it and it will always come back to ambient level.