Was going to replace my 09 27" iMac but decided to add ram and keep it for a few more years and replace my old windows 15" laptop. I will always need a desktop, so what would complement my mac better the 13" or 15"? It will get moved around the house alot and taken on business trips. I do like the 13" compact size but when you see them together the bigger screen looks great but is probably not a real use comparison. Same specs 13" is $700 cheaper too. 8gb 256g gb.