I like my WIllow case for 15" Ti PB. http://www.willowdesign.com/NL-11.html
Well built, machine fits great, nice padding, great handle and strap, but clip that keeps strap on bag is prone to pop off. Other than that, bag has survived two years of heavy use quite well. Definitely looks like a computer bag. A tad bulky but lots of room for power supply, Wacom tablet, and a good sized book, plus pockets for folders, pens, etc. Opens from side so you can leave PB in it and work in your lap.
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I like my WIllow case for 15" Ti PB. http://www.willowdesign.com/NL-11.html Well built, machine fits great, nice padding, great handle and strap, but clip that keeps strap on bag is prone to pop off. Other than that, bag has survived two years of heavy use quite well. Definitely looks like a computer bag. A tad bulky but lots of room for power supply, Wacom tablet, and a good sized book, plus pockets for folders, pens, etc. Opens from side so you can leave PB in it and work in your lap.