Smallest backpack for dslr+laptop (14" max)?

So, what do you reckon, what's the most compact backpack which can hold 20D, 70-200L4, 17-40 couple of primes AND a 12-14 inch laptop computer?

At the moment I'm using Lowepro Slingshot 200 which can hold all 20d, 17-40, 70-200l4, 50f1.4 and 85f1.8. I'm planning to get a small laptop for travelling so the max size is 14.1".

I've checked Computrekker AW (too massive) and Adventure 9 (more or less the same) and other Lowepros backpacks (too pricey). Are there any other reasonable alternatives?

Thanks for any assistance

Check out the National Geographic Medium Backpack thread, there's lots of reviews and opinions on it. I love mine, it fits all my gear and still room to spare, if I needed it. I just don't have things packed properly right now. It is a very solidly built backpack. I'm in love with it.

I have the Lowerpro CompuDayPack. It holds a 350D with EF-S 17-55 F2.8 IS USM attached, EF 70-300 IS USM, EF-S 10-22 USM and a 14" laptop in the laptop compartment. It has a compartment on top that I use for batteries, CF cards, hoods, lunch, etc