Great work! Keep them coming!
#41-43 Love the energy and color and the use of 3D space. These designs are too complex. Try to find some simpler solutions which focus on our company's missing.
#44 Clever but does not illicit any energy or emotion.
#45 & 46 - Nice and clever use of the V. This reminds us of the logo for a US regional phone company verizon. <www.verizon.com> If we use this the color of the checkmark would have to be different.
#47 - The chrome look is different and we really like the typefaces. See comments for #51/52/53 below
#48-50 We're not sure if the circle is a better treatment than the squares. We definitely prefer the name of the company next to the symbol rather than below, and like the use of color in the name to match the logo.
#51-53 Nice and neat. There have been several logos this far which show a swirl (lets call it a flux) going around internally. This can also appear that something is going down the drain especially in a round shape. We should be careful with this.
Lets think of a flux as a force field, a series of lines which form a 3 dimensional plane which is not flat.
for inspiration see the following (but it mus be much simpler!)
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http://www.light-and-illusion.com/space-art-science-fiction-art/wp-content/uploads/2009/09/gravitational-light-quantum-shift-2009.jpg>