well, G2-Hosting.Com already hosts 1 Gamerz Site and a Clan Site. We would be willing to meet your needs in exchange for G2-Hosting.Com Advertisement on your site.
But I should inform you, the chances of your site using anywhere near 15GB of Bandwidth in your first 6 months are pretty slim. G2-Hosting.Com is prepared to meet all your requests except the bandwidth. We could start you at something much lower then that, and if your site does well, we would have no problems raising your Band.
If your interested, you can contact me directly at firstname.lastname@example.org
and I wil get it setup for you.