Hello,
There's been good advice given so far, here's a bit of my small change...
I would go for a built-in webcam, less hassle, one less little component to crush, lose or break.
15" is a nice size if you want decent portability with a full feature machine. 13" make more compromises or get pretty expensive.
17" are larger and heavier, so unless you absolutely want a full keyboard (with numeric keypad), I'd say they're too big.
Bluetooth capability + headset goes nicely with the webcam, this way you're able to have a conversation without your hotel room neighbors having to hear all of it because of speakers. (If you have one with a cellphone, you should be able to use it with your PC as well.)
While you might not be in a rush to get a laptop with a BlueRay drive, some laptops have so-called "modular" optical drive bays, which are somewhat standardized and upgradeable. I've since become a fan of replacing the optical drive with a hard drive in a caddy and using an external USB optical drive when necessary.
Get an external USB3 (or eSATA if you happen to have that port) backup hard drive you can leave at home, and keep it up to date with FreeFileSync. Its a neat little free, open-source program. But in any case, KEEP BACKUPS!!!! While hard drives themselves sometimes fail, your computer could get damaged in many other ways, or just plain old stolen. (Mine was October 2009, but I lost no significant data because I followed the previous piece of advice.) For maximum data integrity, you can rotate a pair of hard drives, or make periodic backups on DVD-R and store them at another (preferably distant) location.
Most laptops today come with some sort of way to restore them to factory settings. There are a couple of things I'd like to say regarding these:
-They're often put on your hard drive as a hidden partition of some sort, with DVDs not provided. You *need* these DVDs. They're your main ticket out of paying some computer tech to reinstall OS, applications, drivers and all, should your hard drive physically fail.
-They're often loaded with stuff you don't need.
-They often lack stuff you need.
Which brings me to my next suggestion:
When you get your laptop, install the main applications you use: office suite, browser and e-mail clients (if you use Firefox and Thunderbird) and so on. Update the OS, applications and drivers. Set every option and setting to your liking. Then make (or get made) an image of this customized partition. So that the next time you want to start with a clean slate, you can use that instead. Better yet, make an updated version of that image while you're at it.
Many laptop brands don't actually design the laptops they sell. I've seen laptops from one brand that were clearly made by different ODMs (original design manufacturers) one being of decent quality, the other having a lousy touchpad and other assorted flaws.
For more information, I'll forward you to
http://forum.notebookreview.com/ instead.
Goodbye,
Louis