Nice 1st entry! I like the concept of the icon and the coloring. It looks very fresh and modern. I would like to see another version of the icon looking more like a car emblem - if you know what I mean? I don't know if it will make it better, but I think it could be cool.
#154 is actually really cool - my only concern is that it reminds me of a bull-head. But of course I can tell that it resembles a capital "T". The font is also looking very good. Can you make a version with the "TB" from entry #103 inside the emblem of #154?
I like the new version #160 very much! One thing I would like to see changed is the outer stroke of the emblem (the light blue part). Maybe it could be in a light or dark gray (or even chrome - without being too shiny). I think it will put more focus on the "TB" without that blue stroke since its the same color as the letter "t". Another way of doing it could be to use "TB" background (gray/black) and put some shine on it. Maybe you could also make the edge (blue stroke) a little bit thinner.
Wow, I think the new design (#167) is really good! Great work on the edge! The text in the bottom of the logo is also much better now when you have made it a little darker. I would like to see #167 with a gray/dark gray background - a little bit like #160 - only darker. This is because I like the shading of "TB" inside the emblem (the shading doesn't have to be very visible - you just have to see that it is there). It is not easy to see when it is black shadow on black background. I would also like to see the the highlight gradient at the top made of a half-circle shape other than the S-shape. A little bit like #154 - only not so high (by this I mean the shape).