
The smaller your bag, the easier you'll travel!
Do you really need 100l? If you aren't trekking, and don't have camping gear, you could probably do a year's travelling on half that, and still have space for souvenirs.
Don't forget... you can buy cheap stuff locally and leave cheap stuff behind (with the locals!) to cope with changing conditions.
It may well be that you require this capacity for your travelling, but if you take the attitude that everything you need for a year has to start out in your bag then you'll have a very different trip.
Oh... if you're looking for rugged travel luggage I have never tried the Berghaus, but Trunk&Co by Samsonite are very good and smart enough to turn up to a nice hotel without looking like a grotty backpacker...
Now I'm envious... a year travelling... hope you have an absolutely amazing time!
John