Should I buy a Nexus 5, even though I have an iPhone 5S? 10 POINTS?

I have had the iPhone 5S since launch, and although that im happy with it, I really would like to see what android has to offer. I only like stock android, not touch wiz, HTC sence, etc. Thats why I like the Nexus 5. Its also unlocked which is a good thing, so that would mean its basically prepaid... right? I have told a couple of my buddies and they said that It would be a waste of money to have two phones, although I am what some may call a geek. So should I just wait 2 years, or should I just get the unlocked Nexus 5? Thanks!