I just ordered a late 2013 refurb with 16GB and a 1TB fusion drive. I was going to get a late 2012 but the price difference was negligible and then while deciding the 2012 model disappeared from the refurb inventory. Since I will be doing bootcamp and gaming the modest boost in graphics was worth it to me and I definitely wanted 16GB. It obviously depends on what you'll be using it for, but get it with everything you want, if you want lots of internal storage then get the 3TB regular or fusion drive, get it will all the RAM you want, its cheaper to get it with maxed out RAM from apple then to buy it yourself, at least for me here in Canada anyway.