& it's weight is more than offset by it's comfort
Agree to a point Ross. I've had Macpac Glissade and Pursuit packs and....well, you'll know what I'm talking about
First-class all round excellent straps / hipbelts, bomber fabric / stitching etc. Both had internal frames. The Glissade is a big expedition pack and carried big loads very comfortably. However, the extra comfort though is really at the points of contact between your pack and you - you're still carrying the extra weight on your legs.
I've now sold those packs on (and my Villain) and for longer treks turn to my ZPacks Arc Blast 52L, although I find it works for me as a weekend pack too as it's very flexible for different loads. The lightweight external frame makes a huge difference and while the straps look basic they are very well designed and executed, I've carried 5.5kg of Base Weight plus 7kg of consumables without any problem. Those double hip belt straps shown in Tacblades #30 post work really well and achieve a really comfortable fit around the hips. I was somewhat sceptical about these superlight packs and don't expect them to last as long but in the space of a decade I've lost a kilo in pack weight just from the pack itself, have the features I need and won't be turning back.
Pippy1969, I'd certainly give the cottage manufacturers careful consideration. One thing I'll say about the Cottagers in that they'll usually sort out any problems PDQ. They know that we're pretty well-connected as a community and that word will spread around their market rapidly, both good and bad. Oh, did I say - fit, fit and fit! Measure your back length and whittle down the choice from that.