Looking to upgrade my mid-2012 MBP to an SSD to improve speed. My current machine runs incredibly slow; slow to wake, slow to load apps, slow to do almost anything. I'm looking in the 1TB range so I don't have to keep all of my stuff on an external. Other than standard web browsing, I use the machine for Lightroom, some video editing, and a little steam gaming here and there. Based on this, is it worth spending the extra money for the Extreme Pro, the Samsung 850 Evo, or the Crucial MX200 over the Ultra II? Current Amazon Pricing: Sandisk Ultra II 960GB - $379 Sandisk Extreme Pro 960GB - $479 Samsung 850 EVO 1TB - $419 Crucial MX200 1TB - $445 Thanks!