Hiya I would like some advice about a desktop computer for home. My current set-up is a late 2008 aluminum macbook. I recently installed a bigger hard drive and more ram, taking it to 750 GB and 8GB respectively. So, I am not afraid to tinker. I got a real kick out of updating my MB, took me back many years to the time I first cracked the case on my Mac SE to add two 256 MB ram chips! All this to say, I kinda like the idea of being able to update my computer, rather than replace it. That being said, I am wanting a desktop machine. I can afford the latest whiz-bang iMac, but my research suggests that they are not as readily customizable as I might like. Is that correct? My inclination is to buy a refurbished 21.5" iMac from Apple. Would the 2011 spec be more adaptable than the 2012? I spend a lot of time on the computer, but never doing anything particularly taxing -- browsing, itunes and iphoto, and updating my websites. I would appreciate any advice. Thanks.