That is what I use. It retails $300 but you can find it in outlet stores for $150 since I think it's discontinued. If you know a Cole Haan / Nike employee who can buy it for you, it will be down to $75.
I have the FUL side car as well. For the money, you would be hard pressed to find a better bag.
But, I wanted something a little bigger. I recently bought a small backpack from TJ Maxx. Not sure if the store is in your area. Something like $35.00. Plenty of space for the ipad, folders, a book or 2 depending on size, just a little bigger than the FUL. Could hold my 13" MBP need be.
LT warranty as well.
No need to spend hundreds of dollars on a good bag unless you want to.