Hi, I have decided to buy a new MBP 13" base model (2.5GHz). After that I will upgrade it with 8GB RAM and a 256GB SSD (I think I'll buy it via OWC). I want this computer to made some audio edition, use with Virtual DJ an Traktor and also made some picture edition. Do you think that for this kind of use is important the difference between the 2.5 and 2.9GHz CPU)?? Thank you very much!