That's a tough call - the G2 is so wonderful, and the automation available on it makes it extremely fast to use if you need it to, and it's a cinch to carry the camera and a full complement of lenses for it in a very small bag. The optics are perhaps the best ever for 35mm. On the flip side, with the bulk of the Mamiya 7, you also get that big negative, and as the hot-rodders from Detroit always said, "there's no substitute for (square) inches". And the glass for the 7 is perhaps the best glass made in Medium Format. But it's bulky, heavy, and the long lens has a substantial minimum-focus deficit and is slow (f8), making it a bad portrait lens, unlike the 90 for the G2. Quel Dilemma!