What do you think?

Im going with #2, #3 green seems to bright for me, the blue is best i think. Although add the background pattern into #2

 

Imo you should change the background. I think it's too contrasting, and I don't think red fits with green, maybe make it blue/lightblue instead. Just an opinion

 

Second version should be your obvious choice. The blue definitely flows alot better then the green.

 

personally i like the second design
soooooo much better! lol
still not keen on blue/green mixed in design 3 (or for that matter 1....but i guess thats why you keep changing it lol!!!)

 

I think you should dim out the pattern and desaturate the red a little. It draws too much attention to the background, instead of the content.

Also, regarding the logo, green over red gives a nasty vibrant effect on the edges and makes the text poorly visible and somewhat disturbing. Try adding a semi-transparent white outline to it or something.

Now there's a couple of more things I can think about, like consistency. The site is web-2.0-ish, but the logo is not. Try to do something about that, maybe. I don't see the connection between the site you're building and the background motif. I would maybe try a variation of the Wordpress logo, also faded out, of course.

With or without these, though, I think it's more than ok. Try to get some feedback from your users after you launch. That always helps.

Good luck.