Don't rule out Core Data! It's very nice (especially with the new concurrency APIs); it hasn't yet been brought totally up to speed with iCloud, but it's been i

Don't rule out Core Data! It's very nice (especially with the new concurrency APIs); it hasn't yet been brought totally up to speed with iCloud, but it's been improving every year. Remember that OS X is on annual releases now, so there will be more improvements this year and so on.