Hi, I have a MBP 15" C2D. I want to protect my case against scratches when I'm using it but then also be able to put it in a slim neoprene type sleeve (for extra protection) before it goes in my messenger bag. Read about the Speck clear plastic cases and they seem to fit my purpose since the case stays on the laptop during use. Wanted to know whether the Speck cased MBP will fit in another sleeve like the InCase or Booq Vyper - or will it be too tight? Anyone else who's using a MBP with a Speck case have suggestions on what other slim profile sleeve can be used? Thanks!