Fullface XXL Helmet under $100.00? Where have you found them?
I think a full face helmet is one of those things you have to hold, try one, move around with to really know if it's going to fit and you can live with it. I have a friend who modifies the foam with a grinder on sight unseen helmets he buys and it works out well (he just shaves them, no major removal of material) and even he's given up on mail order full face.
I've been to that store.....it's kinda hit and miss on sizes and stuff..... Yes it is a bit of a drive.