At this scale, the air is pretty thin and the selection small. Especially since apparently currently called Sling backpacks are in fashion: einschlaufig, easy to turn from back to stomach, with quick access to the camera from above. However, this failed due to the lack of tripod mount and the fact that the second camera is not easily accommodate with lens on many models, because the separate compartments are often not designed for it. As I feel the single strap has a burden in the amount of equipment and quick access do not need, I opted for a traditional backpack.
As exclusion factor for the few remaining models (such as the ranks of the well-known manufacturers, eg from Tamrac Adventure or Lowepro Trekker) proved the Sigma super telephoto. With a diameter of about 20cm, it requires a corresponding depth of the backpack and: it shall not be transported constantly placed. This is not practical and a trick with which on many publicity photos to interested parties in my opinion a (too) large storage space is played. For the Bilora that is certainly no problem: up to 55cm height, 32cm width and 22cm depth are two long and ten short Velcro separators to divide almost any (and this abuse when needed as a cushion). In principle one can thereby also make a part completely empty in order to fill it with hiking utensils. For me, however, was crucial that I could accommodate the 450D with lens and the large Sigma easily. And it would save all the above things even more space - for another WW lens, intermediate rings or tele-converter, for example :-).
Even otherwise, the 320-R provides Appealing: tripod holder, cell phone pocket and three more outside pockets (1x small, 1x medium, 1x big), etc. which are perfect for notebooks, spare batteries, spare memory cards, manuals. These two additional inside pockets inside the lid and a (narrow) Laptop Bag - I believe so much luggage nobody. If it does: in the ground there is a rain cover, which bag can still serve as a mini space reserve.
At the end of course there's something to complain about. If delivery of the backpack smelled pretty strongly of plastic, but put it after one day. And during extended use it is quite warm on the back, here is the moderate price becomes noticeable. For me these two points, however, were less important because I want to have my equipment together and wear them not for days without interruption through the area.
Conclusion: I am very satisfied. For relatively little money, you get a fully-equipped, well-made camera bag with stand holder, rain cover and a limited shortcut "(fold down only the upper half of the cover after discontinuation). In the competition of the better known brands you have to pay either pay much more or do without equipment Details - for me a convincing product.