I am a lifelong Dell Laptop user, but have decided that upon the death (after 2 years) of my latest laptop, I am switching over to a Mac - the MacBook Pro to be precise. And to be even more precise the 15" one. I am just not sure which 15" to get, and what upgrades to purchase. This will be a home use computer, so I will basically be using it to listen and download music, upload and view pictures, watch movies, and regular internet activity. As of now, using it beyond those things is not really planned. I am just not sure if I should be concerned with the processor speed and hard drive speed. The 15"'s come with either 2.4GHz, 2.53GHz, or 2.66GHz and each can be upgraded to a 500GB Hard Drive with either 5400 rpm or 7200 rpm. I am ok with spending the extra money if needed or if it will help keep the product alive longer. I plan on keeping this laptop for a while but not sure what is enough. Is there anything else in addition to what I mentioned above that I should be concerned with? Any advice is appreciated.