I have the philips 4300K kit (from Trevor @ visualdynamics.ca) got them before everyone started talking about the different temperatures and all of that. I LOVE them. Worth every single penny ($423.09 shipped from Canada on a GB)

good luck with your choice, but I wouldn't settle for any less light output than the 4300K's.. any higher, and you get a more blue color, but less light output.. IMO the 4300K Philips kit is PURE WHITE with hints of blue at different angles. I love it.

..Alex