I see the logic in that, sunking, but you'll feel like just as big of a photographer when your pictures produce the same results from a camera that weighs half as much.
I do love my G11 and wouldn't trade it for an S90, but if there is a medical reason that OP cannot carry an SLR, it would be best, I think, to reduce the weight as far as possible. It may look like an ordinary P&S, but it's got the power of something much more.

