Looking for an Advance File Hosting CMS -- for a Gaming website

Hi all,

Im looking for an Advance File Hosting CMS. I want to use it for a gaming website, and use it to upload Mods (game Modifications), I already have one on vBulletin in which you can check here to get more ideas:

My already vBulletin Addon: http://gamemodscore.org/downloads.php

I am looking for the following features:
The following features are already in the vBulletin Addon I have installed on the link above.

• Users can search trough the categories and Subcategories provided by Admin
• Users can download files uploaded by other registered users.
• Upload files, and also possible to add mirrors
• Users can add screenshots and a thumbnail for their uploaded files.
• Users can add title, description and Author (file developer) for their uploaded files.
• Users can rate each others files.
• Users that upload a file are marked as Uploader
• Users can comment on files

No there are some more options I want but that are not in the addon I installed.

• Have this to be stand alone and mergable with forum users
• Have Have a video tab, in which you can add youtube
• Have a count for Unique Downlods, total downloads.

and something that is important to my goal:

• User management, so the admin can see how many files a user has uploaded, and how many times has it been downloaded.
• there are more options I wish to include, but they are minor and avoidable now.

I know that maybe a CMS is not made for these exact specifications, but maybe there is one that can be expanded and customized ?

or if i were to ask a team of developers and designer to make something like this for me, how much would it cost ?

Thanks lot, I have been visiting the site for a few years now, a great source of info, but today i found the need to register and start asking my own questions, thanks lot in advance for your help.