I have a late 2008 aluminum unibody macbook I've had for five years now. I got it from my girlfriend who had it for a year before me. She bought it refurbished. It's a 2.5GHz core 2 duo with 8GB RAM and a 320GB HDD. I use it every day as my web browing, photoshop, whatever machine. At home I have a 2012 i7 mac mini with 16GB of ram I use for video work and everyday stuff. But my macbook comes to the office with me every day. I don't need anything too fancy and will probably buy used. This machine works well, generally speaking, but its biggest issue is that it chokes heavily on internet video. Especially HD video. It probably doesn't help that on average I keep about 20 Safari tabs open at all times. So I need something that will playback HD video well and would prefer something with USB3 jacks on it. I would rather not spend over $800. Just because I don't have a ton of money to spend on computers. But it also needs more storage than I currently have (320GB) because I keep my entire music library on it (about 80GB) and it's what I sync my iPhone to since I always have this machine with me. I'd also like to stick with a 13" screen. What do you recommend?