I used to insist on JTs. I had an x-fire, and then got a flex-7 mask. They were pretty good, and I liked the wider field of vision with the flex-7. That was until I found out that a mask could actually be comfortable, rather than just tolerable.
I've since found that the V-Force line accommodates glasses very well, and fits faces with large noses much better than JTs (thank goodness). I personally like the field of vision better out of my profilers than out of the flex-7.