To be honest, I think 10 trees per set sounds like sufficient variety.
So if I'm interpreting the images correctly, the leaves are all face-me images?
Also, how kind of computer specs do you have and how smooth do the models of the trees rotate and pan on your computer? I have an i7 computer with a Quadro FX1700 graphics card but I also have a weedy laptop that cannot handle much, which I use quite often also.
Thanks! Keep us updated π