I went the separate outlet route but a tad different. I am currently in the process of instaling a small 600w inverter. Actually 2 inverters a 300w xantrex msw I got for $21 shipped and a 600w I got for $45. I wanted to see if the smaller inverter was more efficient at light loads.
I ran wire from the batt compartment into a closet where there was already some wires ran. I did this because the inverter instructions said it was dangerous for the inverter and batts to be near eachother. My propane tanks are also in the same compartment. Anyway, I went to lowes and bought 3 metal recepticle boxes and recepticles along with some 16 ga insulated wire. I ran 1 box into the entertainment area through one side of the closet and I'm running another into the bedroom behind the tv. Both of these outlets, I ran into a single box next to the inverter with a 2 ft long cord coming out the other side and a 3 prong plug on the end.
I ran a wire with a plug from a 120v wall outlet into the closet and wired it to a recepticle box that way I have shore power right next to the inverter. Switching from inverter to shore is simply just unplugging from out outlet and plugging into the other (inverter outlet or shore outlet box).
I have both tvs and related periferials wired into the new outlet boxes, that way I just have 1 single plug to worry about. The kitchet and bathroom still have no juice but I could probably rig something up there if need be later on.