Simplified, for those who didn't want to read the whole thing: Looking at: 13" 2.66GHz 4 GB RAM 500GB 5400 rpm HDD 15" 2.53GHz 4 GB RAM 500GB 7200 rpm HDD Factors: -switching from a 15" PC laptop, this is my first Mac -college student wanting to buy during iTouch rebate -like the portability, battery life, GHz, weight, and price of the 13" -worried about the older C2D and can only configure the HDD up to 5400 HDD in the 13" customization -like the bigger screen, i5 processor (with Hyper Threading and Turbo Boost), hi res and anti glare options in the 15" -do not like the weight (even though it's a pound difference), price, and slightly lower battery life of the 15" -will be using it for word processing, iTunes, Safari, Firefox, instant messaging, watching movies and TV, casual photo editing in Photoshop (although I suppose I could use iPhoto now.) -worried about overheating and freezing, especially in the 15" I am accustomed to, and am hoping to keep this laptop for 5-7 years. I don't want to regret this major purchase in two years because the C2Ds are practically "extinct" and the i5s are still going strong with great reviews and happy customers. Which should I get? And should I be worrying about the issues I mentioned? Surely I should not let them stop me from purchasing a MBP...? Kudos and thank you for those of you who happen to stop by this thread, and an extra thank you for those of you who leave your two cents. **Edited because it was wayy too long.