All, I'm a PC user that has had it and i'm making the switch to the new MBP. I was waiting for the refresh and i'm going to be getting the top of the line 15". I don't need it but I want to pay the extra upfront and get the best. I plan to upgrade the HDD to a SSD and ram to 8gb (from OWC not apple) shortly after getting the MBP. I plan to only use the SSD for the OS and applications. All other files will be stored on the HDD relocated to the optibay. My budget is limiting me to around a 120gb SSD. What i'm wondering is that large enough for the OS and Apps? I know it varies a lot on the amount of apps and their size but just in general how much space does the OS use? I went to my local apple store and looked around and it appeared that most of the machines in there were using 200+ GB of drive space, I really hope that most of that was "unneeded stuff" that they had on there for demo purposes. Thank you for your help and sorry for the novel.