I love entry #30, very simple and outstanding !
I also like the structure of entry #16, how the logo is placed over the letters and the background in blue. That placement for a rectangular / square logo is great. Very stylish. I would also like to try horizontally, placing the logo on the left and the letters on the right. For a banner logo for the web page.
I love the colour combinations, blue stands as very professional and stylish.
Combined with grey background in entry #26 looks great too !
Thanks ! Keep it coming !