RE: Internal Frame Backpack??
Badlands or Eberlestock are the most well known ones. You may find your load shifting a bit more with an internal frame. I prefer to have a good external for heavy long loads.
For short weekend jaunts I use the Blacks Creek Alaskan 2. I purchased a new external framefor this year. I had the Cabelas Outfitter pack. I purchased the outfitters extreme frame this year and removed the top bar and the freight shelf. The pack is 5300 cu/in and weighs 8.5 lbs set up in this manner.
Last night I weighed these following items, this kinda goes along with the gear that you posted on another post.
1-The pack and fame mentioned above
2-Thermarest 3/4 pad
3-10 ft XPG tarp
4-bivy bag
5- eureka 15 degree bag
6 -MSR stove
7- titanium cup
all these items weighed in at 15.5 lbs. This should be 1 fuel can short of taking care of my cooking needs and accomodations.