I don't like any of them. And let me tell you why.
"Simple & clean" is great, but I have this weird habit of trying to invoke NLP into my logo's. By "NLP" I mean I try to anchor my logo's so they have a strong feeling of familiarity and trust to them.
Now this may sound crazy, but your logo is somewhat similar to the logo of the USPS. When I saw it, I thought "damn, there is something familiar about that logo but I just can't put my hands on it". So I started searching online and realized it was the USPS cause I just tracked a package there yesterday. Hundreds of thousands if not millions of people go to their site everyday to check tracking on packages, so with a few simple changes you can invoke a strong feeling of familiarity and trust.
Go look at this site:
https://www.usps.com/
If that was my logo I'd move the clipboard from 3D all the way to the left. Then I'd use the slanted text from 3A. But I'd use the slanted text in a straight line. So they're not on top of each other. After that, I'd recolor "copy" to black, and "paste" to the color of the clipboard.
That way you'll wind up with a logo that subconsciously reminds people of the USPS, a very huge, old and trusted brand.
Frank Kern use to do the same shit on his sites. He stole the Great Seal of the United States and reedited into his own logo. He was able to anchor his new, untrusted brand, with a symbol that bears a massive preponderance of credibility.
People may not like this concept, but I use it on all my sites and it's just 1 part of many steps that helps make my sites look and feel very trustworthy. Because the only greater currency than money is trust.
-BB