Kelly B.wrote a review of Arc'teryx Briza 62 Backpack - 3540-4030cu in - Women's on March 23, 2009
This pack is the only pack that I could find that has all of the features I was looking for. It is large enough for extended trips with a sleeping bag, pad, tent, warm clothes, etc. It would also work well for long trips abroad. I can't imagine ever needing a larger pack than this. It also cinches down to a much smaller size when it isn't full.
IMPORTANT: There are two difference to take note of
1. Even though it isn't listed in the specs, there IS a detachable waist pack for day trips. You simply take off the pack lid which has a separate belt built in. This was a big reason I bought the pack. I'm not one for fanny packs but I discovered the belt is long enough that you can wear the waist pack as an purse.
2. The berry color is not as bright as you would think from the picture. It is a very cute deep raspberry.