I am going to be a freshman in college and I will soon be purchasing a macbook pro. I can't decide if i should get a 13" i5 with 256 gb ssd or a 13" i7 with a 128 ssd. I'd consider myself an average user, not doing anything too complicated. On my macbook that I have now I have only used 95gb/250gb of hard drive. Which computer is the better choice? Thanks.