Re: As a Mac user, how locked am I to the Apple ecosystem? The answer turns out to be "very."
As a new Android user I am discovering new things I can do every day that I cannot do in iOS. For example, it may sound like a small thing, but it's indicative, I think, of the more open Android system and the ability of developers to code for it. In the Facebook app, suppose I see an image in a post I want to email to a friend. I must do the following:
1. Touch the image to open it.
2. Long touch to save to the camera roll.
3. Go into Photos > camera roll and select the photo.
4. Mail the photo from there. And when I'm done I'm left with the photo in the camera roll.
In Android 4.3 on the Nexus, I can simply touch the image in Facebook and then touch the sharing symbol, touch Share and up pops a page of choices letting me do all these things: Add to DropBox, Amazon send to Kindle, open up in a graphics app I installed called AVG Image Shrinker, send to Box, send to Copy, send to Google Drive, create an Evernote note, share on Facebook and much more. One of the options is Gmail - so I can just email the photo directly. No need to go through all the steps I must in iOS.
There are lots of things like that throughout the UI. Another example I love is you can send any file as attachments in Mail. In the Mail app in iOS you can only send image files. In Android 4.3 you have a whole file system at your disposal. I have complained about the lack of ability to directly email PDF files at the Apple forums. Yes, there are work arounds via 3rd party apps. But you don't have to jump through hoops to do it in Android. It just feels to me like there is more available to do just a touch or two away.
I think examples like that make all the difference in the world, and even though I'm a long-time iOS users (iPhone 3G, iPhone 4, iPhone 5, iPad 1 and iPad 2) I think the Android OS is more feature rich and, dare I say it, a better OS than iOS.
There are some things which are better in iOS. The ability to do a complete backup, via iTunes, on your computer, for example. And of course I'm still having issues with syncing some things from my Mac. If you are heavily tied to the Apple ecosystem and don't have patience and the various syncing is critical to you, you have to think about whether the better feature set compensates for the trouble of figuring out syncing outside of iTunes.
But music is not an issue. The included Google Music Manager works well (and there are several 3rd party apps reported to be even better). Syncing iTunes playlists was trivial with the Google Music Manager. I expect you would not have trouble syncing any music you have in iTunes, assuming it is not DRM protected. I've never used audio books though, so I can't verify that for you. If there is a free one I can download from iTunes I'd be happy to test though.
Anyway, I find myself picking up and playing with my Nexus 7 more than I do my iPad. So that should tell you something.
Oh - and don't forget the Swype keyboard. It is amazing!
doug