I agree no: 3 is working best and you really do need to pick the one that your happy with - it is your business afterall and you need to live with it. Only things I'd say is that now no: 3 has been developed there are too many elements, when the logo is used small say on a business card alot of these elements will be lost and unreadable.
Where possible keep it... simple, memorable, and if possible with a little twist.
The colours aren't right for me either, they are too subdued, even though your industry doesn't require bright neon colours the could do with looking at as currently they are making the whole logo weak in appearance.
This is probably more feedback than you wanted though ...
