getting close to running my power wires for the amps

is it better to run the possitive directly off the battery or go to the switch?

I'd like to go directly to the battery for the main reason its a whole lot easier, and my thinking is that if the battery switch is off, the stereo switch on the dash will not turn the amps on so I really would not have to worry about battery draw

if i go this way, would the amps ever be able to draw power without the the system being on ?

thanks guys