Already great answers here. I've found that the softbox is just as important if not more so, than which brand of LED panel.
Aditya is right-on about the 672C's... they also have battery-powered capabilities. I've had good luck with the "Fancier" brand--they're a bit cheaper but mine came with a temperature knob as well as a dimmer. Unfortunately no battery power.
What I'll toss into the ring is the Airbox Inflatable Softbox. It evens the light out in a room beautifully. They are well worth the price for improving LED lighting.
I have been collaborating with another screenwriter this year.... we have become big fans of writerduet.com. Free. Web-based. It's great. Don't know about importing though.