I don't know much about works but I think you can get either double or triple rate with or without rezzies. If your worried about money, unless you race, you don't really need the rezzies. Not sure what I linked you to on the Rocky Mountain site. Another good shock that you should consider is TCS I think they are a little cheaper than Elkas and just about as good. TCS's would be better than the works from what I understand, I've never tried either.
If you get Elkas your looking at roughly $900 for the fronts, I got mine straight from Elka.
For the Elka's call Eric @ (450) 655-4855