Hi, I downloaded the trial of iWork '09 and I really like it. It complements Office 2008 really well, better in some ways. Anyway, I want to purchase it from the Apple Store. I can either purchase a serial number that is emailed to me to enter into the trial version or a boxed version that is shipped to me. Which way should I go? I guess if I get the boxed, I have to install the trial and reinstall from the DVD or something? Is getting the serial number just as good? Thanks.