Backpack for 350D, 70-200mmF4L IS and 300mmf4L

Hi All,
This question might have been asked earlier, but the threads I went through were limited and did not provide adequate info on the product I was looking for. Going by my weight of 60Kgs (132lbs) I surely need a backpack which is lightweight. Less than 3 lbs would be an ideal solution.
The backpack I liked the most was Tenba Messenger Photo/Laptop daypack, but I am not sure if it will be handle both the lenses. I like a couple of Crumpler bags as well but don't know if they will suffice as well. I need something which will take me on Safari expeditions as well.

Any help is highly appreciated.

P.S I don't own any of the lenses mentioned above, but have been budgeting for the same for the past couple of years and am going to order the 70-200mm f4L IS shortly. Hopefully should also have 300mm f4L IS in my kitty if things go as planned. Photography being a passion and not profession adds to my limited expenditure and budgeting on the equipment.

I would look at the Lowepro Mini Trekker AW. I have one and it is a great back. I have had your combo all in mine with the 18-55mm kit lens and a ton of accessories.

Hi Trophy,
Thank you for your feedback

No worries.... I am actually looking at getting a bigger bag now, as I just got a 7D so I need to pack to bodies and some lenses. But for what you have (or will have) and when I want to take 1 body that bag is perfect!