there is so much prejudice about android here.
i admit android pre-ICS or even pre-JB if you are extremely demanding was a sub-par product, but it has made enormous progress over the past 18 months starting with 4.1 JB.
before i used to look at android with disgust and disdain, now i feel likewise about iOS 7.
JB and KK are not only extremely advanced, versatile and solid operating systems, but very fun to use as well.
I am basing my decision on past experience. Start with the Nexus 4. The phone would have been a year old for me in February. The thing had battery problems almost since the beginning. There were plenty of times when I would get it out to use an hour after arriving to work and the battery would be down to 50-60%. I unplugged it just before leaving for work.
Then there were the countless times the phone would turn on and start doing things in my pocket such as setting alarms and calling people. It would somehow get past the pattern unlock and just keep doing things until I felt it get hot in my pocket.
I have never had an iPhone do any of these things.
Second device I bought was a Nexus 7, 32GB Cellular. I was lucky if I could use the thing with a total on screen time of one hour over 16-18 hrs before it needed charging. I could actually use it for a total of 3hrs if I used it immediately after charging. After 3hrs, it needed charging.
I only bought the Nexus 7 because everyone said it had a better screen than the iPad Mini and I thought it could be a nice Mini replacement. Four months later, I bought an iPad Mini and wished I would never have wasted time on the Nexus 7. If I had bought the Mini first, there would never have been wasted money on the Nexus 7.
I have had the Nexus 4 & 7 listed in Craigslist for months now and have had offers for less than $100 for each. THat's practically giving them away.
Sold my white unlocked 16GB 4S for $300 a week before Christmas.
I had money saved to buy the Nexus 5. When it came out I didn't buy it right away though I wanted to. Then I watched YouTube reviews that mentioned the battery would be down to 30% or so after seven hours. I would be insane to put up with that again after dealing with the 4&7. I took the money I had saved and bought the iPhone 5S.
One of the greatest features that got me on the 5S was the Touch ID. It works so well that I use it even at home. If the Nexus 4 would have had something like this, it would have solved the problem of the phone turning on and running down the battery in my pocket. The pin code unlock on the Nexus 4 was annoying because not only did I have to enter the four numbers but then I had to press the return button. That's right, one extra button to push when I had one hand to do it with at my job and it was annoying so I used the pattern unlock.
I have never been more happy since buying my 5S and Retina Mini. I love the Mini so much that I spent $900 on the thing and got the 128GB cellular version.
I've even started reading books again because the screen on the Mini makes it so much easier and enjoyable. I tried reading in the Nexus 7 and I could never last more than 20 minutes or so.
I have valid reasons here for wanting to never go back to Android and they are hardly prejudiced. Don't even get me started on the apps. Compare the same app on Android as with the iOS version and there were rarely tablet versions for the Nexus 7 when there were iPad versions for years already.