Thanks all for buying Osprey and your positive words about the Aether. Ian - you might be interested to know that the Aether has a floating lid design, so you can easily increase the volume of the Aether 70 by another 10 litres to 80 litres in total by extending the lid. I would say this should negate your need for the 85 litre version which is why we don't have that pack in Europe - only in the US. if you really do need an 85 litre pack then the Argon is a better carry than the Aether 85 for those really heavy loads - it has a much more substantial hipbelt than the Aether and also has twin alloy stays for better load transfer - the Aether is a single stay design.
The fabric on both is pretty durable, i don't think you'll have a problem in that area.
Regards
Rob
Osprey