For years I've always used Tamrac bags for carrying my cameras. They are always well-built and comfortable to carry. After starting to carry a laptop about 5 years ago, I must have tried 7-8 computer bags from a variety of companies. None were really satisfactory. I eventually started using (and still do) a 20 year old Tamrac camera bag for my computer for travel when I'm working locally.
However when I fly, I need a larger bag because I have to carry more accessories. Only in the last year have I found an air travel bag that I am happy with. Once again, it is from Tamrac. It's from their Authentic Traveler division and is called the
Classic VI Computer Case. Without a doubt, it has the most comfortable shoulder strap that I have ever used.