I am new to MacRumors so forgive me if I am in the wrong section. My old MacBook has gone to the Big Apple in the sky. I like the size of the 13" Pro but here are my questions. What ever I get will be my "do all" computer. I need the usual web surfing, e-mail, word documents, spread sheets, iTunes, and simple photo processing. I would also like to run some boating navigation programs. I don't do any film making or heavy graphics. So, will I notice the difference between the Intel Core 2 Duo processor on the 13" vs the Intel Core i5 on the 15"? Also, any reason to fork over the extra cash for a solid state hard-drive? Thank you for your advice.