Goggles that fit a System4 helmet ?

Recently tried some old ski-goggles with the System 4 helmet. Needed to use the visor for a long ride `into the sunset'. Worked very well, albeit that the strap was rather tight.

So... Now looking for a source for some proper m/c goggles. Being a laziod, I want to order over the web, but want to make sure that they fit `into' the helmet.

Any recommendations?

(Ordered my GS two weeks ago - Prestige Motorcycles; Bexleyheath, Kent - quoted delivery mid-November )