Here's where I'm having a problem: I have a Late 2008 15 inch MacBook Pro. 2.4Ghz Core 2 Duo, NVIDIA Geforce 9400 + 9600M GT 256MB, 1440x900 display. I feel it's on the way out. I upgraded it to 8GB RAM and a 750 GB Hard drive. I've had to replace the MagSafe charger 3 times (at least) and likewise for the battery, the left hinge has already been replaced DIY by myself and it is starting to bend up towards the screen on that corner. It feels too slow and I want to upgrade. I'm accustomed to a 15 inch so I want to stay with one with dGPU. I want a 15 inch Mid 2015 MacBook Pro with Retina Display. 2.5GHz Quad-core Intel Core i7, Turbo Boost up to 3.7GHz. 16GB 1600MHz DDR3L SDRAM. 1TB PCIe-based Flash Storage. Intel Iris Pro Graphics + AMD Radeon R9 M370X with 2GB GDDR5 memory. My problem is the justification of it. 3672.90 CAD to be precise at the current price. I have to either borrow the money from my parents (they think they can fix it, I feel they can't, this machine is becoming a money pit) or save the money over a couple years and get it outright. The way my current machine is, I'm afraid it will die before I can save the money needed to replace it! If I want to get any money from my parents, I need to justify the performance and benefits. With the metrics in hand, I hope I can make it work with my parents. So spill the raw data: How much of a performance increase and battery life will I get going from my old beater to a new machine?