I'm a bit of an Apple hater but I've kicked around the idea of getting one anyway. If I ever do, I'm gonna get the big ass one because I want it as a game platform for the number of notable exclusives. I've a got a 7" nexus and it does everything I want outside of iOS games and is cheaper.
I made a mistake before and got a gaming laptop, and regretted it ever since. Just build a PC and don't be afraid about the processes. It's super easy and there are plenty of videos out there to help you out (check out lifehacker). Best of all, it's a lot of fun and relaxing.
Yeah, real relaxing...Don't get me wrong I enjoy it, but there is nothing worse than having $700-1000 of paperweights if a part comes DOA or something else pops up.