I found this little marine radio when looking for something to replace my stock radio in the VR. The radio is the Prospec Electronics MIL-PRV15. It is a compact all aluminum watertight housing that fits in a 3" round hole and is held in place by a U-shaped bracket from the back. The amp is 40W x 4 and has plenty of power to light up the stock speakers. You also have the ability to plug in a USB flash drive with your favorite MP3's as a source or use the AUX in jacks. Prospec also makes a moisture proof USB-AUX jack that I opted for to bring the USB and AUX jacks to the radio panel. I grabbed the radio for $99.95 at overtons.com. I got the remote jack at the company's website for another $20 plus shipping.
http://www.prospecelectronics.com/product_info.php?products_id=136
The LED switch in the lower right is connected to a DPDT relay that routes the output to either the speakers or to the headset cable. I also added a 20dB pad (diagram on request) to the headset output to limit the volume to the headset.