hey,
i really like #31, the thing is that lufo.com is only a brand/label so the symbol should be more significant to digital and printing. i guess it should have nothing to do with the word lufo. you used L+F for the symbol but it would be great if you have more ideas for that, keep the style of the word lufo.com but try to find a symbol which tells the viewer more about our business (online print shop, printing, digital printing etc.)
thx