Okay, so I'm looking at getting a new rucksack to hold all my gear while I'm out an about on my bike! I'm pretty set on getting a Fastpack (I think). I'm just wondering if anyone can give me an recommendation on what size to get? 150/250/350? has anyone used any of these, my reason for asking is that I can't seem to find anywhere local to me that stock them! So I'm not sure which size I'll need.
I'm also open to other ideas as well! So please feel free to recommend.
My gear is:
650D + Grip
24 - 105mm L
10 - 22mm
40mm Pancake
55 - 250mm
Hopefully a 100mm macro at some point too.
Manfrotto 190xprob + 804RC head
Macbook pro 13"
Plus I'll probably be carrying some Dr. Dre Studio beats, some lunch and a drink or two.
Any ideas on what size I'll need or any other rucksacks I should consider?
Thanks guys! 






