I have the Cabelas Alaskan Outfitter frame pack. It is really nice. Excellent support, carries a lot, and is the most comfortable frame I have used. It will also fit about any human body made. It's not cheap, around $95. I used a $10 frame I got from a second hand store for years. Ugly and painful, but it did do the job.

It really is a nice frame for those looking for a new one.