By far and away my favorite two, so far. Very classic & vintage. My favorite would be number 37. I'd like to somehow see it be able to additionally capture the feel of technology (thinking a bit more progressive). maybe it's not possible, but well done.
ON number 38, I really like it, but as a general rule I was told to not have a logo ever feel broken, rusted, etc. While it definitely captures vintage and would look awesome on a pair of jeans, it's not quite appropriate for letterhead.
#43 is excellent. Is it possible to do some variations of this particular logo? Also in terms of multi-use; print, t-shirts, etc. I just want to make sure that going forward, the logo can be affordably transitioned across multiple types of media. If a shade or hue of color makes the difference between printing costs, I'd rather err on the side of affordability.
Thank you for your kind words. Of course, as I always do if I win, I will provide you with all usual variations of the logo: original gradient colors (CMYK and RGB) on white/transparent background, 2 solid colors (with the closest match for Pantone) and simplified B&W version. This logo will not cause any trouble. If printing capabilities are limited, you can always use 2 flat colors version. I'll upload simplified version soon. Of course, we can still tweak this logo according to your liking.