The 8000k is new I believe. I bought one last week and my endcaps and such finally arrived so I just hooked it up. It seems to produce a fairly whitish/yellow cast. Definately not as pink as the 9325K but they are an enigma
I think I like these bulbs, although they might be a bit pricy and this is my first PC bulb. I also got a 10000k from Hellolights today for another tank so I will be able to compare them soon.