I've been planning on buying the new iMac for quite some time now but needed some few things sorted out first before proceeding. Im a PC guy all my life and this will be my first Mac computer. i really wanted to have the SSD upgrade but im not sure im willing to pay the extra high price so i'll probably get the cheapest iMac with 500GB hard drive and just buy a cheaper SSD. But before i do that i just want to make sure it can be done. i want the SSD to be the main drive for the OS and apps while the hard drive for backing up files only. although i've already read posts that it can be done on the 27" model, i still wanted to make sure it's possible on 21.5" base model. So, is it possible? Any guides/links showing how to do this? Can you recommend any SSD brand? Can i also upgrade the graphics card? Any help will be highly appreciated.