I found window light nirvana with a Elinchrom Rotalux 74-Inches Octabox Light Bank on a Gravity Backdrop

Elinchrom vs Profoto: Why I Own 4 Octaboxes

If you were expecting a side-by-side head-to-head comparison of these modifiers, this review is not for you. Over the course of 10 or so years I have owned 6 different octaboxes made by Profoto, Elinchrom and Photoflex. I will discuss below why I changed horses midstream to arrive at where I am today and how I felt about using each modifier.