For use in a relatively basic audio studio using Logic 8. I need portability at the moment so a laptop is a no-brainer. But should I buy a low end spec MBP for the interim until I add a desktop to the setup..or should I splash out on a maxed out 17'' MBP - 4GB RAM, 7200 HD, Hi Res (maybe) - instead and save having to buy a desktop later? I will only be portable probably once a month, so the bigger slightly clumsier 17'' isn't really an issue to move around. Thanks.