Omega 3 for MacBook Pro
I'm using Windows 7 under Parallels professionally and in my spare time I use Photoshop/Aperture working on 25Mb pictures from my Canon 5D II. And I'm too lazy to close programs...
5 minute job, really. MacBook is sooo much snappier with all my programs running simultaneously. What a treat!
RAM is the most important speed accelerator in your computer. Don't hesitate to upgrade!