I carry a MacBook Pro 15.4" in my PNT stealth. I can't do overnights without it because i live in the internet and my computer for most bit of entertainment including movies. This is despite carrying an iPhone too.

I have to take the computer, and its sleeve, out of the bag and bring it into the cockpit for safe keeping otherwise it will not fit in the CRJ 200/700/900 bins. The 900 has nice closets that fit the whole bag.