Kitsune,
Sorry about the asthma/nausea. I went out earlier to ride and hit a wall of humidity and promprty turned around and went back into my A/C.

Saddle-no clue about the preferenced of MTBs.

My saddle has the sitbone indentations-not really visable, but when my bum is properly on the seat it is as if they become one-weird, but sweet for riding and never a soft tissue issue. As for the flare rubbing your leg-I do not recall that ever being an issue-but when I first rode I wore my capris. Now when I look at my saddle it has formed to my body shape (which is sweet since it has been less than a month), so the sides no longer "flare", but look more contoured to my leg/bum shape, if that makes any sense?

As for your tummy-ask your doc about prevacid-I take it once daily and it works wonders. I did Prilosec and all the others until we stumbled unto this one and no side effects.