Hi,
I just got the Transpack TRV. It is exactly what I wanted. There is space for the boots on the sides, and the center section easily holds a helmet. It could almost hold two. There's a pocket on the back/top of the inner center section where the helmet goes and then the top flap also has a pocket. If you need more space, the sides where the boots go have a thin slip pocket each where the stripe is on the side. Lots of space, looks like strong zippers, and you can stow the straps inside a special pouch. I'm sure this will last a long time. My rugged old Demetre (remember Demetre wool ski sweaters?) bag from the seventies has given up with the zippers breaking. 30 years of use is hard to beat.
So if you are looking for a good bag, try one of these.
I know this sounds like a commercial, but it's so much better organized than many of the other bags I looked at.
Icanski