Need help choosing HPS bulb

I plan on using a sunmaster 600w MH conversion bulb for vegg but not sure what brand HPS to use for flowering . I know they emit a red/orange light but I want to maintain the best blue spectrum possible. Which brand has the best blue spectrum?

What is your reason for wanting the best blue spectrum possible. i know that blue is important, but to me id rather have a more efficient bulb all around then buy one just because it has a blue boost in it.

then what is the most efficient

Hortilux. Best HPS out there, in my humble opinion. I use the Super Hortilux 1000 watt. 140,000 lumens and a boost in the 400-500 nm. range. I do use 2-4 foot floursent T-12's with 40 watt Philips Agrolite bulbs (available at any Home Depot) and two 68 watt cfls to enhance the spectrum and balance the light in the growroom.

http://www.eyehortilux.com/superblue.html i agree hortilux but if you want blue then this one

http://www.eyehortilux.com/superblue.html i agree hortilux but this one