On your big tree, I'd go with the C9 covers over the dumb strings. Ray sells them separate, but I bet you could order some dumb strings with the covers already on them. It doesn't look like that tree is saturated, so you're probably going to want close to the same number of lights or it's going to look sparse. The tree on the left and second to the right look like they have a lot, so you can definitely get by with less dumb nodes. The tree second to the left, you can get by with slightly less than you currently have on it.
The black, white, and green wire looks great, but what about wiring? You have to be very careful. Even with color coded wires, I still managed to mis-wire a couple strings. Have to pay a lot more attention if they're all the same color. Although the wire looks like a circus nearby, I didn't find it that visible. Not sure which I'm going with this year.