I have never owned a mac computer so this is all very new for me. I also have never made such a big purchase, so it is a big deal. I'm a part-time photographer and graphic design student so I need a laptop which can run Photoshop and Lightroom with ease. I want to buy refurbished and my budget is under $2000. Ideally though the sweet spot would be about $1500. At first I was set on purchasing a 13" because I preferred the smaller size and portability however I know there are a lot of upgrades and benefits to the 15" which may make it more cost effective. I really just want the best refurb, bang for my buck I can get without throwing away money on specs I do not need. I currently have a Sony Vaio pc and it has 4GB RAM and i5 core 2.53ghz. It has been ok with storing my photos, have never ran out of storage space. However it is really slow, old and Lightroom lags like crazy. The refurb options I had my eye on were... Refurbished 13.3-inch MacBook Pro 2.8GHz Dual-core Intel i7 with Retina Display 8GB of 1600MHz DDR3L SDRAM 512GB Flash Storage $1599 Refurbished 15.4-inch MacBook Pro 2.2GHz Quad-core Intel i7 with Retina Display 16GB of 1600MHz DDR3L SDRAM 256GB Flash Storage $1699 Refurbished 15.4-inch MacBook Pro 2.3GHz Quad-core Intel i7 with Retina Display 16GB of 1600MHz DDR3L SDRAM 512GB Flash Storage $1989 but I could be way off for what I need, I am not really sure. I really appreciate any advice.