I bought the first intel MBP 4 years ago. Despite some battle scars it has survived through college and I'm now ready to get a new machine, that will take me through another 4 years. I started off doing a lot of video editing but now I have shifted to predominately web development, Ruby, HTML, CSS, etc. I'm between the following two options: Refurbished MacBook Pro 2.53GHz Intel Core 2 Duo $1,349 vs. 15-inch: 2.4GHz i5. $1,699.00 (student discount) -- Basically, is it worth the extra $400 (what it comes out to in tax) for the i5? I will be glued to this computer and use it everyday, but most of my tasks now are not too heavy. What I most want is a really durable computer that will last me 4 years. Money is tight, I'm working on a startup. Any advice on the longevity of the Core 2 Duo vs i5 would be much appreciated. Thanks.