I don't hold my nose up at the backpack look, it is what it is and pretty accepted as normal professional gear everywhere.
Me, I've always used a messenger bag (put me in the camp wondering why these, and not one- or two-strap knapsacks, became known as messenger bags), as I think it's slightly more professional and much more functional, and you get a lot of utility and durability these days at low cost.
Currently have a
17" Ytonet travel laptop bag that has enough room for all the other things I need when traveling -- laptop, cords, external drive, my Kindle, noise-cancelling headphones, files, my travel bag (earplugs, wipes, eyeshade, adapters, portable battery, etc.). It's expandable and sturdily-built with dedicated pockets for a bunch of different items.
Looks good, has stood up to the rigors of my constant business travel, and was $32 bucks when I bought it.