It appears, from your last post, that you are mainly focusing your efforts on finding only the better hardware. If that's the case, then ANY recently released android tablets will outpace Kindle Fire HD.
The reason is quite simple; Kindle Fire HD was designed to do ONE thing; provide an updated platform to consume Amazon services. It dos not use the main stream Android OS whihc is primarily maintained by Google. It uses a proprietary version of Android (Amazon Fork) which does not or may not, support many Android mainstream features that most people take for granted. On the other hand, it may or does offer features that are not part of the mainstream Android.
In my personal opinion, you should not consider Kindle, just because you will not be able use its most important features, which are, as I mentioned earlier, consuming Amazon services.
Get any other Android tablet, included Nexus 7 or the upcoming 10.