To me, the blue in the tshirt sells this logo. It's practically Steve Jobs modern. And a great blue for incorporating in the site itself. I am going to peg this currently as my #1 pick.

Its beautiful! Make sure its a vex so that you can increase the size and not have to worry about it being blurry.
Thanks nahtnam

btw it's a vector, you can make a Burj-khalifa-sized BILLBOARD out of it!
OP, about watermark, once you get this this logo you can copyright it (since it is original, exclusive and I've made each part of it from scratch and without inspiration/copying from anywhere) and then it will not be possible for any other brands to use it.
Will be adding a second logo today.