Thanks for the suggestions! I'll try to find the sf first.I think there's enough of a difference to be worth checking out. I've held a G30 and it felt big to me, but my G30sf's feel just fine. If you cannot find a Gen 3 G30sf, try to find a Gen 4 G30. The Gen 4 G30 without any back straps fitted should be about the same as the SF frame.
Several years back, I had a chance to shoot my nephew's G30S and did not like it. At the time, I was mostly into 1911s but also had a G23 that I was in love with. Maybe it was the lighter slide, but the G30S seemed snappier than the G23 did to me at the time. For now though, the G30sf seems to have the right balance for me. Sure, it's almost as wide as it is long, but it's still comfortable for carry and shoots well for me.