Mxx, I hadn't thought of front lighting for the fish, I guess I will see how they look when I stock my tank this week... I will defiantly be paying attention now that you have mentioned it!
aphul, I have the cool white XP-G which is 5000-8300K. I think the lighting really makes the colors look great on the plants. Whether it is as great for the plants as it is for my eyes, only time will tell....
I also keep the moonlights on 24-7. As they are really dimmed (I put a resistor in-line with them to get current down to ~40mA) they don't make that much of a difference. I think it helps just enough with the colors though, that I don't want to put them on a timer as well.