I&#x27;ve been running the same 13&quot; MBP for five years. Dual-core processor has been fine for me doing programming, photo editing in Adobe Lightroom, and music production with Avid Pro Tools.<p>I had a 15&quot; Powerbook before that. I went with 13&quot; to make it more portable, and have been happy with that decision. But I also kind of miss the larger screen. I hook it up to a 27&quot; display at home though, so no big deal.<p>For your intended purposes, I think you&#x27;d be fine either way. Pick your favorite size. :-)