I've recently started my own strategic marketing and interactive consulting business. To date, I've been working from home on my early '08 MP. For a variety of reasons, it's time to get out of the house. The funny thing is that with free wireless and a great coffee shop my local public library is a perfect first office / business incubator. At home I use all the "normal" stuff e.g. mail, calendar, Safari, Firefox but I also have Adobe's CS4 Design Premium suite, MS Office, iWork and iLife '09 as well as VMWare running Windows XP with another couple of apps like MS Office, Quickbooks Pro and some industry specific apps. I need help deciding between the "low-end" and "high-end" 15" MBP. I've already decided that regardless of what I get, I'm going to get and extra 2GB of RAM (I want a total of 4GB) and a upgrade the standard HDD to the new 500GB 7200RPM drive. I don't need my MBP to do *everything* my MP can (like video encoding). But, I need to be able to work on most files, do client presentations and generally work mobiley. I'm registered at the local Apple store as a business and they even suggested I could go with just a MB but I'm willing to fork over the extra $ for a larger screen. I figure if I'm going to hole up in the library or a Starbucks all day then I'll really appreciate the bigger screen. Which laptop would you recommend an why?