I would get it if you need it. I am currently running that specific model right now and It is all worth it. People are thinking Haswell is going to be this radical change for the 15" model and its not. Haswell is really built for UltraBooks, not power users. Most users aren't even going to notice the difference in day to day tasks on Haswell honestly. 802.11 AC is a nice upgrade, but not a huge deal breaker for most people, not to mention you must have an AC router to support it. 802.11n is more than capable on running anything you want with great speeds. The integrated graphics is slightly better on Haswell but not too important as you have a dedicated GPU in the 15" which solves anything gaming or any intensive task. I say get the Retina MacBook now and save the money while you can because you know when Haswell comes out, you will most likely not be able to get that same price so grab the machine now, you'll be glad you did,.