I'm planning a trip to base camp Everest in October. I have a fairly comprehensive kit list from the operator I'm using, who recommend a daypack of at least 35litres. I've been trying to decide between the 33 and 44litre Osprey Talon series. I used a 22litre rucksack for the Inca trail, which was only just big enough. I just didn't want to buy one that was too huge and I therefore wouldn't get the use of again as much. Does anyone have much experience and may be able to suggest which one may be better. The larger one is a bit heavier of course.