If your going to spend money, go ahead and spend a little more and get t5 HO. They're cooler, cheaper, and last longer than PC and can use individual reflectors. PCs are outdated.
I like 10,000k, it has a nice color. I'm using 2 10,000k lamps and 2 6,700k lamps. It's cool to see the difference because each set has it's own on/off switch. 6700k looks brown in comparison, 10000k looks a little washed out but is white/blue, and both on at once is perfect and a big difference in color.
CFs waste a ton of light.