I just put a Baron's links kit on mine and set it at the 1" setting. I really like the quality.
I didn't use a progressive rate lowering spring, because I had read that it stiffened the bike up too much (until you load it down). Not sure about that one, but my installer felt that would be the case. Everyone on here seems to love them.
The PCS links kit is really nice, too. The real benefit to it appears to be the quick height change ability from 1" to 2.25". I am running a 260 rear and have no desire to ever change lower than the 1" (unless it is back to stock), so I didn't need that option.
You will find every option and opinion on here. At some point, I am going air-ride.