Omnifocus for iPad offers a feature set that is simply unparalleled by other task management applications. With a beautiful interface that offers you a variety of choices for viewing your projects, Omnifocus gives you peace of mind, knowing that your responsibilities are all collected in one place.
MaxJournal by Omaxmedia is a journaling app for the iPad ($2.99). It offers several useful features in a beautiful, uncluttered interface. More importantly, it is a safe place to store your memories, offering passcode protection, several exporting options, and a backup method using Apple's file sharing via iTunes.
If you are looking for an elegant solution for your task management needs, Taska is an excellent option for both iPhone and iPad. It is reasonably priced, boasts a beautiful UI, offers powerful features, and is being actively developed. Taska has the potential to become one of the best task managers available for the iPhone and iPad.