I was hoping someone could help me understand the new (MBP Retina Oct 2013) 15" model specs, between the high and low end models in terms of graphics. I know that I will be needing (wanting/future-proofing) the 512GB SSD and the 16GB RAM... but is there a particular benefit/drawback using Iris Pro versus the NVIDIA card? My last computer was purchased in early 2006... hard to believe this thing is still running (poorly as of late), but I'm eager to get back into the current technology - but money is an issue and this new purchase needs to last. I'm okay with spending $2500'ish on a new laptop assuming it will last me 5 or more years. (Especially considering my current investment has lasted 7+ years) Needless to say, I'm a little out of the times and I'm not confident about the graphics end of things. As for the other components, I'm good with those. If there are any words of wisdom or links you might provide, I'd be happy to hear them. Essentially, it boils down to this - is it better to use Iris Pro and line-item upgrade the lower end system, or just go with the high end system and call it a day...? Many thanks and all the best!