Recording on a Laptop

I've been meaning to buy a laptop and some software to be able to do some recording on the road, live and also low end "studio" with some insulation and separate inputs. But after looking at equipment and reviews of all different items, I haven't got a clue what would be the best way to go. I don't want to spend more money than is beneficial but at the some time have a flexible budget...so I figured maybe some of you might have some suggestions. I've been leaning towards a MacBook with Logic Express 8.
Any thoughts...
Any thoughts...
