For my bag.. I've gone the "military" look. I'm using a $35 every day carry bag, and have added on a $20 water bottle pouch that holds a 32oz nalgene, and has another pocket. I got a deal for some other smaller pouches from Amazon and will add those on the bag as well. Trying to do it all in black.
The bag is pretty sturdy, and takes the weight of all my work stuff in it well. 2 laptops, notebooks, chargers, other supplies.