First: it's Samplitude, might come in handy when you need to purchase the programme ;-)
Any notebook will do. I run Samplitude 15 on an old IBM T43 when I'm on vacation - 1 Ghz, 2GB RAM, XP - and it runs nicely. Timekillers are when you need to use the "brainwork" and start mixing, adding a lot effects, bounce or finish a production - but that's why they invented coffee :-D