I agree the KJV is not the most accurate. But it's hard to judge accuracy because there's no perfect and undisputed standard by which to judge or compare it. Even KJV bible societies recognise this fact that the KJV has errors. That's why they made the MKJV and /or NKJV to correct these mistakes. I love my MKJV..it's just like the KJV but it has all the words 'spirit' capitalised in the right places as it should be, and is easy to read.. I'm not left confused over what's talking about.
By claiming the KJV bible is the only authorised bible you are saying that it is perhaps 'annointed' by god (yeah it's a loose term) in the same way the untranslated scriptures are. This is pretty much saying it is free of errors which is clearly not the case.
It's a useful translation, but for me and many others it needs to be translated again, the language isn't the language I speak today! So should I translate it from the 'god approved' kjv bible or from the original scriptures?....
All up though, if you really want to use the proper bible, learn greek hebrew and aramaic.