We've used the Furuno First Watch for nearly 4 years now. It's not fancy (unless you consider taking your radar display on your iPhone to the head is fancy...
), but it works great during the day/fog and at night. It's not bluetooth, but it uses a legacy wifi signal so your phone or iPad always pick it up. And it will overlay the radar signal on the TZ iBoat navigation charts, which we think is very cool (I've come to like the TZ iBoat more than Navionics which we had used for years).
We're very happy with Furuno, and not just because we sell them but because we use and rely on it. We have them in our store for $995 with the WIRELESS100 coupon code:
And for those that want a more permanent display, you can also have the DRS4W transmit to a Furuno touch screen display (the optional GP-1971F).
If anyone has any questions on the unit, shoot me a PM.