On #23 - Can you please remove the gradient on the letters and make them all uniform like you have in #6. Try taking out the ".com" completely, and please darken the tagline just a tad.
On #51, can you make two slight adjustments? 1. in the roof line change the gray to blue like in #50, and 2. darken the tag line like you have in #50. We're not too excited about the gradient in #50 but the rest of the logo is good.