In reply to matejn: Hi Matej, last time we spoke was at Krnica... I still owe you a beer, but maybe I can give you some beta on rucksacks in the meantime
I have had a Deuter Guide 35+ (and now a 45+) and an Exped Mountain pro 40.
The Deuters are better bags in my opinion. I really liked the Mountain Pro on paper, but I ripped the base of it the first time I used it (very thin fabric, like their dry bags). Also there is no adjustment with the lid, so you over stuff the bag, the lid tilts back and interferes with the back of your helmet.
The Deuters are heavier, and not waterproof but are more durable and carry heavy loads much more comfortably even with the aluminum struts removed.