[dave_m]

I think log scales is going to be your dealbreaker for OmniGraphSketcher here - we don't do them yet, although they're super high priority for the next Mac update.

The biggest problem with the Excel chart is the bar visualization - it's not immediately clear what you're looking at. If we were doing this chart in OmniGraphSketcher, we'd probably use an "error bar"-type visualization that's more consistent with statistics (see attachment). If it weren't for the log scale thing, banging these out in OGS would be pretty quick indeed.

Have you looked at what Apple Numbers has to offer in the way of charts?