I bought a black shoulderbag McKlein laptop case last time they were having a sale on Woot (though none of the models that are currently being sold). I absolutely love it!
- Looks professional
- Holds up very well (and I'm VERY hard on purses and the like)
- Easy to clean (because of where I put it, it tends to get white paint streaks on it from the wall, which are easy to clean off)
- retains shape even when cramming a lot of items into it
- Pretty much the only con I have is bag specific. In the shoulder bag I purchased, the dedicated laptop slot that has the most padding won't fit super wide screen laptops. My work laptop fits perfectly, but my personal laptop does not as the width is twice the depth at least. My personal laptop fits in other compartments though and I always feel it is safe and secure.
If you have an high end gaming laptop that is very large and wide, you may have issues. Check the dimensions on each bag first. Most other laptops should fit fine. If you are looking for a professional laptop bag, these are the bag for you!