Looking at the specs of the 2011 Macbook Pro's (Intel i7 Core) got me all confused.. The 13inch has the fastest processor (2.7GHz) but its dual-core and not quad-core Also the 13 inch (Intel i7), doesn't have that extra "AMD Radeon HD" graphics card. My Questions are: 1)- What are the benifits/difference between dual-core and quad-core? (shouldn't a quad-core be faster than a dual-core?) 2)- What are the benifits of having the "AMD Radeon HD"? (I'm not a gamer, but I do like to watch movies in 720p or 1080p, but watching HighDef movies on a battery powered laptop might suck, [I'd rather watch it on my 42" Plasma at home.] So Is the graphics card worth it for me?) (P.s I currently watch 720p and 1080p on my MacBook 3,1 [Late 2007 model] and it all seems crisp to me) 3)- The Macbook Pro's that come with the "AMD Radeon HD", can the memeory/processor in that grapic card be used to power the laptop and make it go faster? (i forgot the term for this when u make use of the resrouces in the GPU) 4)- Can I buy my own 1TB, 2.5" Harddrive and easily replace it with what ever drive I get with my Macbook? ( I heard that I might have difficulties when installing OS X on a fresh new (unformatted) hard-drive, with the Original OSX install disc) 5)- Are you a MacBook owner? And how long have you had your MacBook for, I bought a second hand one about a year ago, I would like to know what's the average life span of a MacBook... Would like to make this purchase an 4 to 5 year investment.