you should swap the positions of the Imagine Controllers logo and the Hauppauge Logo around, and like Lyttle Sr said, Expand the bottom light.

The forth one looks a lot more professional looking one out of them all. Its also good to add another color to the it if the whole logo is just black.

Not one of your best works.
The left side of it looks alright but the picture of the guys don't really go with the rest of the header.

Looks great man... you could add a bit more detail to where the water hits the table but other than that I love it.

I personally use Behance as it has more of a professional feel to it and as Illustrated said, its simple.

Not one of my favorite ones you have done... I think it just because there is too much going on.

Loving it man.... Are you working on anything else like this atm?

Loving it, however i'm not to fond of the text.

Im not so great at rating but im loving the idea you have for it, cant wait until its complete

Looks great however im not too keen on the white things floating around behind him