Seeking input/advice on laptop computer for recording

I’m going to get a laptop, for several reasons, not just recording music, but I want a setup that will be good for recording as well. From the little I’ve read I understand a PC box is probably a better way to go because of the flexibilty of upgrading/changing components but I need the portability of a laptop. So I’m asking for input/advice on what to look for, what to avoid, hardware, software, accesories, etc. Big subject, I know, but I mainly want to make sure I start out with a suitable machine. Any links to useful related websites would be appreciated as well. Thanks.