Hey fellas,
The bigeyes is great for shallow stuff. Sorry Sven, but I find the AQA mantis a bit too cumbersome and heavy for warm water diving. I guess it's more about what fits your face.
Anyhow, Aquiles only uses the bigeyes and he's had it down to 110' w/ no problem. The only problems he's had were that some of the one's he's ordered leaked. But, being that the scubastore is so sweet, they promptly shipped him a replacement.
I think the greatest feature about the bigeyes is that the increase in field of vision is quite relaxing.
Another decent mask to try out is the cressi focus or the beauchat mundial. I think they're pretty comfy, too. Same field of vision to the sides as the big eyes, but w/ less volume.
By the way, Adam, if you need a super occhio, I've got quite a few laying around.
Later,
Anderson