Love the direction you are going w/ your logo submissions. Our client loves them.
Some ideas:
Would love to see some variation of the color treatment in the house.
Maybe modify the color blocks somehow so it looks like light shining a bit on #43?
We like 42 as well but hard to tell if it's about lighting.
We are looking for a logo that will also look great in social media profiles. Yours is taking lead because of such and the fact it's just a great designed logo.