need CMS for mobile stuff downloading site with SEO

need help to find out CMS for mobile content downloading site

[ankithonda]

I wanna start new website for mobile stuff.

there ppl can download wallpapers,softwares,ring tones,logos,jokes ...etc. so which CMS system will be best for me? bcz of huge content it should be easy to manage and SEO friendly for good traffic. i wanna add. advertise also ...

give me suggestions ...