I went through the same dilemma that everyone else has, countless hours of research, reading posts and listening to opinions from 'experts'. I was finally able to get a first hand, in person view of the Blue & Pro side by side and the decision was easy at that point. I went with the Pro because it fits exactly what I like & want out of the lights. To me, the Blues were too blue for my space. The Pro is the perfect amount of Blue for my taste.
Its like the Ford or Chevy, or Harley or Honda conversations. Both choices are solid, but you need to do what makes you happy. My suggestion would be to talk to your LFS and get them to set a demo for you. Whatever choice you make will serve you well. Good luck!