Hi Hi Ho,
couldn't resist that haa ha, I'm about in the same situation , trying to set up a simple system that uses less power. I've decided to use the sh 2100 hooked up to this LCD option for Brookhuse NMEA multiplexers
Multiplexer with a small screen! Through the multiplexer I'll feed wind
from cruzpro, Ais to both a eee pc and I'm thinking a gps type navigator at the helm.
With the multiplexer screen I can turn the computer off say at night or on long offshore
voyages. Its also a good backup system. The eee pc is great, 12 volts! mine uses about 0.5 amps when charting with gps puck attached. I'm using Polar Navy
for charting , which is so simple to use and cheap
to buy, highly recommended. With this system I'll have 3 gps 's including garmin's gecko in a steel
box (faraday cage). The gatehouse multiplexer is really useful as all info is at hand at the chart table. The main game
is paper of course,all these toys are supplements to the paper charts
so the cheapest and most economical in power is probably just the necessary charts
and a couple of handheld gps's. Polar Navy
has a programme included which gives neat instruments like wind
(digital) vmg etc. I havn't finished my system yet as we won't be going cruising at least till next summer and with these things its best to hold off as long as possible so one gets the latest tech.