Ditto roadie gal. I've gone through more versions of goggles to find the right pair than I did saddles! Luckily, goggles are cheaper.

I have settled on a pair that actually fit in my sockets a bit so I don't know if they'll be comfortable for LONG swims. I'm not there yet though, so they work for now. I have found that they do need periodic treatment to control the fogging though - I don't know that any goggle is permanently fog-free. My problem is that my head heats up on hard swims so the temp differential between my head and the cold water causes fogging no matter what I do.

It's helpful to find a local swim place that carries lots of styles. Then you can try them on. If the goggle will seal to your eyes without use of the strap, you probably have a good pair for your face. Then, like saddles, you can stock up from online vendors who probably carry them cheaper once you know what to order.