New to Macs
I am getting ready to make the switch from my 4 year old HP laptop to either a 13inch retina macbook pro or macbook air. I'm wanting to get the biggest bang for my buck without investing in a lot of add on's. However, I do want this to last 3-4 years. I am currently using 79GB out of 286GB on my current hard drive. Am I correct in assuming 128GB will be enough for my needs? I save quite a bit of my stuff in Dropbox and can purge a lot of my current documents and crap I have accumulated over the last 4 years. I have about 1000 songs in iTunes and don't really plan on doing a lot of photo or video editing. I basically just need something that will help me get my homework done and be easy to carry on campus. I understand the rMBP is half a pound heavier, but I think it will be feather-lite after carrying around my 8lb brick! Any advice will be appreciated as I am clearly new to the mac world. Also, is there anything else I need to be taking into consideration?
Other things: I own an iPad already, if that matters.