I'm now using a 2010 15" MBP as my main editing machine for photo/video connected to a 27" Thunderbolt Display. 2.4 GhHz, Intel Core I5, 8GB Ram, 320GB. Now I need a faster machine. I will use Lightroom/PS a lot + Final Cut Pro. Should I upgrade it with a SSD disk + change CD drive for an extra internal HD OR invest in a new 15" MBP retina, 2.7GHz, 16GB memory? (2800USD) It will be cheaper to upgrade but feel it might be worth selling it for a new MBP. A new one I can easily use for 3-4 years but not sure that the old one will be good enough when It's upgraded with SSD drive. Any thoughts?