Hi, I'm currently using mid-2012 13" MBA for iOS App Development primarily and as my everyday laptop, browsing, movies, spotify etc but not gaming. I felt that the power is not enough and intrigued to upgrade to a rMBP, I even like its form factor more than MBA. I plan to buy the one with 8gb RAM and 256gb SSD and fortunately the price for newly release rMBP dropped to $1399 in my place. However, I manage to get a deal on late-2013 rMBP with same RAM and SSD capacity for $1199 (maybe it's so cheap for stock clearance but it is a new unit). The difference is I got a previous gen rMBP however as I noticed the only difference is just 0.2GHz clock speed, no other significant different I can notice. I strongly feel that the $1199 rMBP is way more value-per-money purchase even though it is an older version. What do you guys think? Buy the latest version for extra 0.2GHz and $200 more or stick with my plan? If go for $1399, why?