Hey, thanks for the input. I got two heavy duty spdt switches and wired them in today. One side going to empty ignition spots on the fuse panel and the other side going to my eventual battery bank. The "always on" power was run from the starter battery - I came to the same conclusion that it would take forever to run the battery down and I could maintain the radio memory by not going through the switch.
The current setup has one switch for the radio and satellite radio receiver. I also have a second switch set up the same way and it will control three accessory outlets (cig lighters) for an ipod adapter, cell phone charging, etc.
Now I just need to get my batteries, fuse/distribution panel, and a battery charge meter would be nice.