They're nice Not sure about the T and U joining in the first one. The second one needs kerning and I don't think the M and K should join. the third one is perfect in my opinion lol -
I like the last one a lot! The 1st is pretty cool too. The middle one needs more to it I think. I'm uneducated in the logo realm though. So, you can discount my opinion.
One day I'll grow up and hopefully get paid to use photoshop. Sweet logos bro, I like the second one the most, although I don't like the two combining together.