i've decided it's time to move on from my el-cheapo goggles to something, well, better ... I'm after a pair that will ideally have interchangeable lenses, including one set for low or flat flight conditions, anti-fog, will fit over a helmet, and have the capacity to cope well in a cold climate (eg Canada, where I'm off to next). Ones that seem to crop up during on-line research include Smith IOS, Dragon NFX2, Anon Wm1, and Electric EG3. Any recommendations, anyone? Also, is this the type of item best tried on in-store rather than purchased on-line?