My favorite bag is the 7 Million Dollar Home. It fits 1dmkiii, 16-35, 70-200 f2.8IS, 50 1.8, 85 1.8, 430ex, 5x8 writing pad and pens, lens pens, blowers, card reader, flash and sd cards, hell, i can even stuff my xt with 17-85 if i pack it right.
Best backpack i know of is the Kata R103. Fits exactly into an airplane seat, holds all the above as well. More padding and protection than you can imagine, but also slightly heavier. But the straps on that thing are amazing, your legs get tired before your back.
I don't hate macs or OSX, I hate people and statements that portray them as better than anything else. Macs are A solution, not THE solution. Get a good desktop i7 with Windows 7 and come tell me that sucks for photo or video editing.
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