Tibetan Dictionary

A friend of mine has this question, which I'm posting in several communities--I hope you'll forgive the repetition:

"Does anyone have a good recommendation for a Tibetan Dictionary?
I have heard that in some printings of the Sarat Chandra Das the Tibetan fonts are nearly illegible. If you do have a good copy, can you give me the printing date?

I also wondered if anyone has tried out the digital Illuminator Dictionary? Thoughts on going solely digital vs. paper?

Since a dictionary is quite an investment, I would appreciate any advice."