I am looking to upgrade the cheap-o marine stereo on the fly bridge. What I am thinking of doing will require more power to the fly bridge than the meager DC power cable that is currently run to the area. My peak power requirements at 12V would be in the 35A range (amps, sub woofers, etc). I believe these are my options: 1) Run new DC power cable from the panel. This would be difficult given the #6 gauge required. 2) Install a AC-DC power converter in an enclosed dry area in the fly bridge. This would allow thinner guage 115VAC power to be run to the fly bridge, and a shorter run of DC cable. Downside is a decent power converter is expensive, and is actively cooled (fan). The genset (or shorepower) is normally running on the boat. 3) Install a battery and battery charger in the fly bridge. Same benefits of #2, but a battery charger is a little cheaper and probably more reliable than a power converter since it can be lower power. Downside, it is a little clumsier of an installation with the battery box, etc. Thoughts and recommendations?