I had to give it a 3D feel, hope you like it. If you can give me some feedback regarding the fonts you like (modern, futuristic, sans serif, caps or not...) that would be great.
#4, I've re-looked at this, and at first glance the "O" of Bladon looks too close to the "D". You should look for a font that gives a greater differentiation between these two characters.
#17, I like the introduction of a 3D effect, however, I'd loose the circle around the periphery and at first glance it looks like a propellor from a submarine. The focus here is automotive/aerospace.
#17, on fonts I'm still open uppercase v. lowercase or mix. However, needs to be "classic", "subtle" "easy to read", not to "blocky" or "bold", or "avantguard" or too "modern"