I went for the Kata 3N1-30.
Photo taken from: http://www.kata-bags.com/index.asp?UP1=OK
It`s a backpack with a larger camera compartement and a smaller compartement for various stuff you need when hiking (like water, towel etc.).
What i really like about the backpack is that you can have it mounted in a sling pack way or an ordinary backpack.
In reviews, some ppl complained that the Kata wasn`t really comfortable when going on longer hikes.
However that`s not the case for me.
Currently i have 3 lenses (just medium sized ones, but a 70-200 f2.8 would also fit in the bag when mounted on the body)
+ Eos 7D with battery grip in the bag, but there`s at least room for one more lens.
The Kata 3N1 looks rather unspectecular and the build quality is nice, which are both pluses.
Btw: Am i allowed to use a product image the way i did above ? Or am i breaking any rules ?