I'm Silver with DL and plan to ask either CO or NW to comp my status so I can abandon DL (due to DL's fare based upgrade restriction). Which has the better elite program at the silver level, CO or NW? From what I've read on the 2 boards, it seems that NW is a bit better, and NW certainly offers many more promotions than CO. Complaints on both boards about award availability seem to be roughly equal.