Hey there! I would like to get into editing videos (taken on iphone 6) on a beginner's level using iMovie app. I hear different people saying different things. I hear some people say 5th gen dual core (13 inch MCB) renders smoother iMovies than 4th gen i7 quad core (15 inch retina MCB). All I want is to make entry level iMovies, without overpaying... Here are 2 models I was looking at on amazon (both early 2015): Apple MacBook Pro MF840LL/A 13.3-Inch Laptop with Retina Display (256 GB, 2.7 GHz dual-core Intel Core i5 processor, 8 GB 1866 MHz LPDDR3 RAM), Silver VS Apple Macbook Pro MJLQ2LL/A 15-inch Laptop (2.2 GHz Intel Core i7 Processor, 16GB RAM, 256 GB Hard Drive, Mac OS X) What would you recommend?