I'm looking into purchasing a 20" iMac, and need to decide a few things before I buy it. First off, is it better to self-install RAM? I'm looking at installing up to 1 GB extra (so total 1 GB or 1.5 GB). How much different is installing RAM on a Mac than it is on a PC? Secondly, I get a rebate with a purchase of a printer. I'm looking into either a Canon or Epson. Which is better? We'd be using it to print documents and photos mostly. Any specific recommendations are welcomed as well. Finally, is AppleCare worth it, especially if the main users for the computer are people that have never used Macs before? Thanks!