I've plugged it before and I'll plug it again. I'm in love with my Brenthaven MetroLite.
http://www.brenthaven.com/catalog-me...-xf-black.html
I do agree that a backpack isn't optimal with a suit, but my job makes me lug around tons of devices and cables in addition to my laptop and this fits a ton, keeps everything padded, very organized, built like a tank and is x-ray friendly. I love it.