I started my inverter install today. I found a new in box Xantrex 1200 on ebay. This will be used to power the TV/VCR/DVD, heat tape and satellite. Finding a transfer switch was a ~real~ chore but I have one like this on the way:
http://www.krausnaimer.com/0/switch/cat100.htm
I also bought a 9' 18watt heat tape for the drain station that is thermostatically controlled to come on at 38*. I will wire this into the inverter full time as well.