I've uploaded more than few design concepts, with different styles and aesthetic approach (#157 - #169). All of them are HQ designs and I guess it all depends on your preferences and the way you want to form this visual identity.
I've tried to avoid generic and overused designs, and offer more unique approach,...from clean/contemporary/pro looking designs like on entries #159/#160, #161/#162, #163, #167/#168/#169, to complex, but still HQ desingns on entries #157, #158,#164, #165, #166.
Hope you'll like some of them, and if you have some suggestions for improvement (colors, fonts, layout, etc.), feel free to let me know! Thank you!
Regards, Bojan
P.S. My personal favorites would be clean/unique designs, with larger branding potential on entries #159 (negative space version on #160 is also deliverable) and #169 (color adjustment possible, of course)!