which is better for college a 21.5" iMac with 2.9GHz Quad-core Intel Core i5, Turbo Boost up to 3.6GHz, 16GB 1600MHz DDR3 SDRAM -2X8GB and 256GB Flash Storage or 21.5" or iMac with 2.9GHz Quad-core Intel Core i5, Turbo Boost up to 3.6GHz, 8GB 1600MHz DDR3 SDRAM -2XGB and 256GB Flash Storage? and which one will run faster than the other? and is it worth to max the 512gb ssd and when i max it will it run quickly with 16gbram? i hate slow computers no matter what programs am running. plz help out. will appreciate all feedback.