I have had my Gf1 and 20mm for 2 months, and am very happy with both. I would like a second lens for flexibility in terms of wide and zoom.
Until recently I was pretty much determined to get the 14-45: it receives good reviews and offers a nice range. The 14-140 seems to generate less enthusiasm, and slightly less favourable reviews, but certainly the extra reach is attractive.
My Gf1 is generally used for personal stuff, and the news lens would be for some street situations, nature etc.
I would appreciate your thoughts and insights.