Eventually, I see myself upgrading from my WS420-SQ to the WS420-BT. When that happens, I'll sell the 420sq and I'm sure plenty of others will be doing the same. I had thought about getting BT anyway and for me the full DIN sized faceplate will be something that will make my boat look a lot better.

I'm sure that when the time comes to sell my 420sq, that I'll post it on here. But I'm in no hurry because for the price differential between selling my 420sq and buying the 420BT, I'll be taking quite a hit...