Not to further muddy the waters but before making a decision based on color temperature consistency I suggest that you review the charts at
Paul C. Buff - Einstein E640. I know this is a Paul Buff website but if his data is erroneous no one is calling him on it so I tend to respect it. It appears that all of us who are using Einstein lights have nothing but praise for them. I use a mix of AB, WL and Einsteins and I will migrate to all Einstein over the year.
As a more mobile solution (expensive but I believe worth considering) are the QFlashes from Quantum (
Quantum Instruments Inc.). I recently bought a pair and used them extensively this past weekend, they are an absolutely fantastic solution. Not only do they support both Nikon and Canon TTL protocols they have configurations that allow you to wirelessly use your existing speedlights (under TTL) with their Quantum flashes including HSS.
Output is slightly higher than speedlights for their shoe mounted product, about 1.5 stops faster for the Q series and a whopping 400ws for their QX series and (let me say it again) you can use your existing speedlights as part of your lighting architecture all under TTL control.
Quantum has several modes which are unique such as their FILL mode but I will let you read about that.
As Tom mentioned light shaping tools for Elinchrome abundant I dont think anyone has quite the variety that they have. Almost all vendors do, however, have adapters for AB lights (which includes Einstein). Light shaping for the Quantum lights are a little different and generally use any shaping device that will support speedlights, With the Quantum you can also use "bare bulb" lighting, something that is not available with most lights today, it produces a very, very soft bounce-like light, with some direction.
Einsteins and Quantum will be my direction for the next while.
What ever you pick I am sure you will be happy, very few of the well know manufacturers are producing crappy products and if they do the forums would/will be jumping with news.
Good luck in your choice