I have the chance to get a really great deal on an ibook with a 1.33 processor and I am wondering how well it will handle recording. I use Cubase and I have a Presonus Firebox and what I am wanting to do is record demos while I'm on the road. I want to use EZDrummer and a guitar amp sim program (Amplitube, Guitar Rig or whatever) and have everything on the computer. No other outboard gear. Will I run into any problems with processor speed? Will it be a functional system? Any help is appreciated.