I have $2500 to spend on a laptop, but I'm not sure if I should upgrade now or wait for a few years. My current laptop is a 2012 MBP Retina. It has: 512 GB SSD 16 GB RAM 2.6 Ghz i7 GeForce GT 650M 1024 MB I was looking at upgrading to a new 2015 MBPR, but it doesn't look like my new computer would be any better than my current configuration. For $2500, I can get: 512 GB SSD 16GB RAM 2.5 Ghz i7 AMD Radeon R9 M370X 2GB Would I even notice a difference between the two computers? I am a little surprised that in over 3 years, the MBPR line hasn't improved the specs very much (although the cost is better). Thanks for the help!