So, I really want to get a MBP and think I have narrowed it down to the 13" since portability is key for me and I want to try to keep it afordable. I will be using it a lot for preparing presentations, surfing, e-mail, photos (iphoto from dSLR) and making home movies in imovie (1080i from Sony HDR-SR8). I need some advice. Do you think a 13" 2.4 would suffice? Should I spend the $300 on upgrading the RAM to 8gb? Or should I step up to the i5? Thanks for any advice.