+1 for Razors. I have 2x 130W over my 4x2x2 for two years, and I've bought another for my upgrade to 6fter. If I didn't already have the 2x 130Ws, I'd buy two of the 180W 15,000K versions. They're absolutely silent, and have masses of power, great colours, and solid build. Also, their customer service is very good.