Subscribtion managemt

As I find the joomla tools to basic to manage the users of my website I am looking for an extension to arrange this more customized.
I want more options for registration, login, contactforms, subscribe to newsletters, delete account from front-end, etc etc.
Can anyone advice me a good extension which runs smoothly with hikashop.
I don't wanna mess up things.
I use joomla 2.5

Thanks for feedback.

Regarding registration, you can use the registration screen of HikaShop which can be customized via the menu Display->Custom fields.
Regarding newsletters, you can use AcyMailing, which integrates with HikaShop.
For the contact form, you will find loads of extensions to customize it:
extensions.joomla.org/extensions/contact...edback/contact-forms
For the rest, I don't know much the market, so I wouldn't be able to say anything.

Thanks Nicolas,
I am going to explore these options.