ipad email client app

I am looking for an email app on the ipad other than the default 'mail' app. A lot of names show up in google, but I am having a hard time figuring out which ones read your email and which ones don't. Some of these apps read your email on their server in order to provide a better experience, such as better sorting capability, but I don't want to give a third party access to my email. So I basically want an app that is just an IMAP client.. it downloads email to my ipad without the app developer reading/scanning it. On my phone (Android) I use k9 for this, which is open source, but there is no version of k9 for ios. Can any of you recommend an ipad app that will do the job? I'm thinking almost anything will look better than the default 'mail' app.

@csixty4 : Thanks for the recommendation. I can't tell yet if they are just a client (which is what I want), or scan your email on there server before passing on to the user, but I'll keep digging.

@Primejimbo: The default ipad app does the bare minimum, and I am currently using it, so it does work. However there are 2 major issues:
i) The search functionality in the app is really terrible. It as almost as good as not having a search. You can't even tell it to search for emails from a specific person (such as from: garyofcourse), so I need to grab my laptop whenever I want to search for an email real quick.
ii) The interface isn't that great - I can live with boring interface and care more about the functionality, but if there is something out there that is prettier or more slick I would go for it.

I figured the default ipad app cannot be the only one that doesn't mine the user's data from the emails, there must be other good apps that provide better search and a slicker interface, but without storing your emails on their server or mining your data.