I have a 15" MBP. I travel with it quite a lot, in this case: http://axioluggage.com/hardsleeve15.html, however it is not designed for the unibody MBPs. I was wondering if I should get a Speck case to put it in as well as that case, as buy last MBP got really scratched on the battery door. A few questions for any Speck case owners: 1) Does it add much bulk to the laptop? 2) Is it generally worth it? 3) How easily is the case scratched? Thanks.