7-14 wide at work, on G3
I think this lens is reason enough to invest in a m43-body. I owned the Sigma 8-16 with the Pentax K5, but the 7-14 with the GH2 is a much better combination.
Can't speak to the Pentax K5, but I agree with the 7-14 and GH2 being a great combo... The images shot here were with the G3, but the 7-14 balances way better, so feels more "of a piece" with the GH2 body.