I am running 8k/10k BC springs that are 20mm shorter all around and 20mm shorter rear struts. If you want to be pretty low WITHOUT compressing the shock, this is the way to do it. I kind of wish I got 30-40mm shorter rear struts as I'm 1mm from sitting the strut on the ebrake cable.
I didn't even know you could get them that short, thought it was just 20mm shorter. I'll have to ask about that when I call to order.