I'm buying a new laptop. I noticed that all the new laptops just have "mic in" inputs, where my old one has a "mic in" and a "line in". I thought the "line in" worked a little better at registering sound on my old comp. However ... are new laptops designed to capture sound just as well...

Ok - I'm almost completely sold on the Nano - but I wonder how it really holds up to jogging/working out, etc. Of course, they say it is fine, but does jogging aggravate that screen cracking problem? Just wondering - Help me out, Head Fi People!