would love to see #5 on black background as well as white. although our name has horse in it, we deal with all things the old farmer has used. hope that helps
#19 is a vectorized photo I took on a recent trip... thought it was very cool rusty farm equipment .. it would limit your logo to full color print ... so maybe an alternate one color version would be needed.
17 has lead the contest because its so clean and original. Feel free to add any touches that put it over the top, that our clients see us as THE art studio for their rustic art. thanks!