My base weight is 12lbs and I have no stove, which I worked out in another thread. That's full camping gear. Shelter, clothing, etc. I guess it's actually 10lbs because I counted my other pack's weight. It would be 15lbs in a Baltoro.
Add to that items I would wish I had if I were backpacking around another country. So 12 pounds PLUS the following. When I traveled for a month and had a night at a bar, I was definitely missing this kind of "casual" stuff:
1 pair Regular pants (something canvas-y, or jeans (god forbid!)
A comfortable, casual sweatshirt
Some T-shirts (2? Zero and buy them there?)
Two pairs of shoes (serious walkers and non-serious shoes, like Vibrams, for beaches and casual strolls)
A book or two (plus maps and a guidebook)
A laptop (Macbook Air) and a charger, and maybe a solar setup
A pillow (Nah, nevermind, I'm just too tough for that.)
A spare battery for the electronics
Better toiletries (an electric shaver [no, I won't use a razor. Aichnophobic], hair conditioner, deodorant)
The "plan" would be to to live out of a techwick shirt and running shorts, like a backpacker, but I'll also have stuff available for social engagements and restaurants and museums.
Essentially, the extra luxuries I'd bring weigh as much as my camping stuff. When I toured the northeast, we lived like hobos, and it was tons of fun until we were at someone's aunt's house, or when we were at a bar with UVM girls and their friends and I'm wearing running shorts and bike shoes. Suddenly, I wish I had brought a T-shirt. That kind of stuff.
So we're looking at 25lbs, 30-40 when we grab a bunch of beers for a hike, or if we grab tons of energy bars on sale somewhere, or whatever. 40 would be upper eschelon, maybe hit it once if that.
Yeah, I'm still thinking the Baltoro 75. The added bonus is, if I get the 75 over the comparable and logical 65, I have a great pack for winter camping and trips where I go with one of my brothers or a girlfriend where I have to carry their stuff too.
I'm still thinking my choice is ok.