In reply to gi:
for this type of stuff ive used a few packs, amongst them the MHW south col, cilo 60L ws and the millet exped65.
thoughts:
cilo feels the best up to about 25kg, then the mhw feels better. this feels to be due to how it loads as the cilo loads more narrowly.
the millet is the largest (up to about 110L id say) and the frame is better for such size loads in volume, but stops being comfortable i find at about 25kg. it loads maybe the best, but the straps dont last as long (about 100 days, opposed to the mhw which is still good after about 150).
the cilo isnt as friendly as the mhw (non-glove friendly buckles, straps a bit dangly), but by far the best when stripped down and the longest lasting. easily the best for actually climbing in too, and lightest.
the strap configuartion on the mhw works better (less bits, more adjustable, more solid).
the mhws pocket only takes poles when full, but when not functions well (tools inside is nice).
mhw make a specific 'big load' belt that is worth it for anything over 25kg for any real time. the regular sth col belt is easily the best weight bearing belt of the three, making it (even tho the millet takes more volume better) the better pack for 35kg type loads.
with the frame sheet removed it still has more form than the cilo if that matters.
the millet has the best access by far (big full length zip) so packs better and nicest to use when in a tent. the belt doesnt strip off tho (god knows why, a real design fault i think).
havent used the cilo 75 (but the same things that shit me about the 60L are present in it it seems).