Hello all! I have been browsing these forums for he last few months as I decided to make the switch from PC to Mac. I appreciate everyone's advice - even if I was just an un-registered interloper. So, this long decision process is almost over. I am deciding between two refurbished models and I would appreciate everyone's input. This model is a 17" with anti-glare and the 2.53 i5 processor. It has 4GB RAM which I would probably upgrade to 8GB myself. This model is $170 more and is the same in all respects, except it has the 2.66 i7 processor. I will probably also upgrade the RAM myself for this one. I will be using the computer for photo editing in LR and PSE (maybe PS), some video editing, word processing for work (going to buy Word for Mac), iTunes, etc. - much of it at the same time (hence the desire to upgrade the RAM). I just want to confirm that the i5 will be sufficient. My worry is that I plan on having this laptop for at least 4 years and if LR becomes more feature rich then the i5 will start to lag. Anyone have any thoughts? Right now, would I notice a difference between the two with the tasks I am running. If so, what would that difference be? I appreciate everyone's help.