Seems odd that he Spurs are interested in EITHER Salmons or Miller. IMO it's a no-brainer, the Spurs need Miller. With Miller on the roster, while keeping a core of TD/TP/Manu/Mason/Hill/Bowen, the Spurs are dead even with the Lakers come playoff time. Maybe the Spurs are throwing the "either" out there to throw the league/Kings off the Miller scent.
Unfortunately there is not much the Spurs have to offer other than cap relief because I don't think the Spurs would part with Hill or TP.