I'm thinking about getting the top-end 13" rMBP mid-2014. Would you guys think it's worth it to get the 3.0 i7 processor over the 2.8 i5 being offered as the default option? Is there a substantial difference, especially that it's an i7 vs. an i5? Also, would you recommend going for the 1TB SSD over the 512GB? I'm wincing over the $500 upsell. Currently, I use about 200GB of space on my laptop, but of course, times change as technology becomes more advanced. My current laptop is a MBP late 2011, with 2.8 i7 (Sandy Bridge) and a 750gb hard drive. Thanks!