Bike Backpacks - Thoughts and Help

Help me?

I am needing to get a new backpack for my 20+ miles urban bike commute. I carry a macbook pro with me most days and would really love one with reflective elements.​

The Welded Postbag from Chrome has quite a bit of style: industrial feeling hardware, water resistant material. ​

The Ortlieb Velocity Cycling Backpack​ has bright reflective details. Love the top handle too. 

The Timbuk2 Phoenix Cycling Backpack has a lot of storage details, side access panel. Might be particularly good for airport travel too. ​

I would love your thoughts, if you've ever seen, used or bought any of these. I trust you and your wisdom. Help me out.​

14ft StoopidTallBike from CicLAvia

Last weekend's CicLAvia 2013 in  Los Angeles, CA saw this enormous bike, called StoopidTallBike. Indeed.

Richie Trimble explains his work:

14.5ft at the Seat
Built in 12 work hours
One Huffy beach cruiser, 2" square tubing, 3/4" round tubing, and 1" round tubing
26" single speed coaster brake wheelset
6 1/2 single speed bicycle chains (32.5ft of chain)

Music is "Contact High" by Architecture in Helsinki

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