I'm going to jump on the Arena FlakJak's bandwagon with Cat's here.
Wearing glasses and goggles blows, you always have to worry about fogging normally. If I don't wear my glasses, things at distances are not quite as clear (colors, patterns, movement, etc), which in this game is a bit vital. I've owned a set of FlakJak's for years and 9 times out of 10 I have no issues.
A lot of our past and present team members have them as well, I hear of very few issues.
My only complaint is they are not the most "low profile" of eye protection. But the fact I have few fogging issues, replaceable/swap'able lenses, a flexible frame, and removable air vents I find more than compensates.