This spring I started shooting with the Elinchrom Ranger Quadra system kind of moving away from my smaller Nikon flashes. I have gained more power and access to a larger range of light modifiers my favorite for location work is a 27" square softbox.
The C-Stand is a beast to haul around on location but it makes getting the softbox in position so much easier and the weight makes the whole setup more stable in the breeze, had it been windier or if I were using a larger softbox I would have wanted to sandbag the stand.
This image was shot with a Nikon 50mm 1.4 on my D300 with the above lighting setup and processed in Adobe Lightroom.