The Jacuzzi dealer came through and fulfilled what they had promised for taking delivery of the wrong-color tub. In the end they gave us a $500 refund, free GFCI ($170) and a free J-1000 remote ($250-300). We didn't get the stereo with our tub but it will still be neat to control the temp/jets/lights without always having to use the topside panel.
I think that seemed pretty fair. I still would have preferred the Silverwood skirt, as the Roasted Chestnut is already showing wear on the panels and it is brand new, but $1000 value as compensation seems like it is worth it for having to accept the wrong color. And most importantly they came through with what they promised, which I was a little worried about after I'd already taken delivery and given them my bank draft for full payment.