I am looking to buy my first Macbook, a 15" Macbook Pro. Due to budget limitations, I am planning on buying a refurbished unit from Apple. My question is this: what exactly is "refurbished" on the units? Only things that don't work, or are they given a complete overhaul? The reason I ask is that there is a unit right now that I am interested in that is a 2.66 GHz Core i7 with NVIDIA graphics that states it was "originally released in April 2010." I don't believe that the i7 processor was out then, so am I to assume that the processor has been replaced? And the video card? I am a digital imaging student and will be using the laptop for Adobe CS5.5 including Photoshop and Premiere Pro on a routine basis. I do plan to upgrade the RAM and potentially add an SSD after purchase. I am very familiar with PCs including building/upgrading them, but this will be my first personal Mac (having used them at work years ago) so pardon my ignorance. I just want to make sure I am getting the best computer for my somewhat limited budget and the date thing has me stymied. Thank you in advance for your help.