I have three Einsteins and I've been very happy with them. They are extremely versatile because of the 9 stop range, and because they're digital, power settings are precise and reproducible. Color is consistent across all power settings.
For location work, the Vagabond Mini Lithium is also great. Depending on your needs re: rapid recycling and battery life, you could easily power two Einsteins with one VML.
For most any application, the Cyber Commander and a CSXCV for each Einstein is a very elegant system. You're bound to want to meter your strobes and Cyber Commander will do this plus adjust power settings, etc. for each light remotely.
This isn't a sales forum, but if you're looking for opinions from real-world users, that's my $.02.
Shot with a single Einstein, powered by a VML:
