I think it would be a good idea to have some of you guys that are serious about a comfortable and efficient mask try different masks before making a purchase.

I've got a medium and a large MSA millennium.

Maybe meet up so you can check them out along with jafars om10 and whatever anyone else has.

Comfort while wearing it for extended Times and the level of protection are key points.
Don't get put off by the price because you can find them on e-bay for under $100.
The old saying"you get what you pay for" applies more than you know.
There are some pretty uncomfortable masks out there.