I'm getting ready to purchase my first ever mac laptop in the next week or so...I just cannot make up my mind what to go with tho...I mainly will be using the computer for colleges and I take about 2 online courses each semester. So I spend alot of time using my computer writing papers and researching stuff online. I was just wondering how you all like the 13in compared to the 15in? It just seems to me that the 13inch is a little to small. But price is also a issue considering the 15in is so much more expensive. I am planning on using this computer for the next 3 or 4 years atleast so I would like to get something very realiable. As of now these are the 3 i'm trying to choose between: 13in Macbook pro: 2.4ghz Intel Core 2 Duo 4GB Memory 250GB hard drive1 SD card slot Built-in battery (10 hours) NVIDIA GeForce 320M graphics Price: $1099 after education discount 15in REFURBISED macbook pro 2.53 ghz 15.4-inch LED-backlit antiglare widescreen display 4GB memory 250GB hard drive 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW) SD card slot Built-in 7-hour battery NVIDIA GeForce 9400M graphics Illuminated keyboard Price: $1,399 15in Macbook pro 2.4ghz Intel core i5 4gb 320 hard drive intel hd graphics sd card slot nvidea geforce gt330m with 256mb Price: $1,699 with education discount Obvious I would love to go with the 15in with the i5 processor but a extra $600 is alot of money for me right now...But if its worth it in the long run I'm willing to spend it...Please let me know your opinions!