I'm stuck between #51 and #53. I'm torn between the way they are laid out as I like them both. I would like to tweak the tree somehow. Maybe shorten the arc on the bottom on #53. I don't know what to tell you but the tree needs something. Sorry, I know I am not much help!
The typography of #62 is great. I like that Siena is bolded, that the S and G are slightly bigger, and just the overall feel and look. I am not sure how it would play with #84 but wanted to provide some more feedback. Overall, I am growing weary of the all caps look on every logo. I may be drawn to #62 because of that or I may just like it more if that makes sense.