See if they have a clear (preferable) or yellow lens. These would be best for night riding. A lot of people like Persimmon as well, but I find them too dark for the night.
In terms of sizing of the goggles for your GF, EG1 and VZ Phenoms (what I rock) are, IMO, the best goggles for large faces. However, like boots, it's always best to try them on because everyone's faces are different and fit and comfort will vary widely.