I've been considering the 866 springs as well, but I'm afraid they may be a little more than I need in terms of lift and load capacity. Any idea how much lift you got? I want to stay under 2".
Having a similar debate myself. I don't tow, but we're a family of 5 and when loaded for a trip the back sags noticeably. I'm considering OME 865 springs or simply adding spacers. I'm leaning towards springs because spacers won't help with weight carrying.
On a side note, I added an ARB front...