If you don't have your heart set on a portable Mac, I recomend the iMac. It is fast and has a beautiful big screen. For creative proffesionals, get the 27" iMac below. The iMac no longer includes a CD/DVD drive. If you need that be sure and purchase an external one. See below.
Make sure you get one with a Fuision Drive or SSD. Models with a regular hard disk are much slower and even a casual user will notice the difference.