Plugin recommendation – StackExchange style Q&A

Happy to spend a bit of money to get this right.

I’m looking for a comprehensive Q&A plugin which has the following features:

• Can be used with my very customised theme
• Ability to ask questions
• Ability to post answers
• Ability to ask comments on both questions and answers
• Reputation and voting system, similar to WPSE etc.
• Ability to attach images in questions and answers
• Rich text editor (preferably wp_editor style but I’ll put up with something else if I have to). Italic text is mandatory for writing scientific names.

I’d also like the following:

• Badges which I can rename/add descriptions to
• Bounties

I paid a fair amount of money for the Q&A Plugin subscription and it was hopeless. Looks good on the outside, but no comments or media attachment which makes the system useless in my eyes. Nor does it have anything above reputation for engagement.

I know there have been other Questions on this subject and I’ve looked into those, but I have quite specific requirements where the others appear not to.

I’ve seen AskIt which appears not to have a rich text editor or the facility to attach media. I’ve also seen Sofa Q&A which appears to be an entire theme rather than just a plugin, though I have asked the author if it would work with my site.

Does anyone have any other suggestions? There must be something out there!