Alternative to Einstein E640?

Though I haven't used them, you might want to look at the Elinchrom BxRi lights or the Elinchrom 600rx lights - they're more expensive than the Einsteins, but not by as much as say the Profotos. Perhaps someone here who has experience with both Elinchrom and Einstein could comment on the differences.

Stuart
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http://www.stuartruckman.com