Yeah, we Mac bigots are obnoxious about it, right?
As Prpixel says, the hard drive size isn't important if you're really not going to download or rip much music. RAM is important, though, so that you can increase the streaming buffer size as high as necessary to avoid stops and starts. It's generally very easy to install RAM yourself and you can often save quite a bit of money by starting with the basic laptop configuration and buying the RAM separately. More RAM is always better.
Here's what looks like a decent guide to setting up a laptop for listening to streaming audio and it's PC specific. http://www.cajunradio.org/faq.html
As Prpixel says, the hard drive size isn't important if you're really not going to download or rip much music. RAM is important, though, so that you can increase the streaming buffer size as high as necessary to avoid stops and starts. It's generally very easy to install RAM yourself and you can often save quite a bit of money by starting with the basic laptop configuration and buying the RAM separately. More RAM is always better.
Here's what looks like a decent guide to setting up a laptop for listening to streaming audio and it's PC specific. http://www.cajunradio.org/faq.html