Get the one with the Neg bus. It will make EVERYTHING easier on the install.
Oh yeah, when you install, go ahead and take the time to properly route all of your wires and protect them in wire loom. It looks nicer and also it's easier IF the need to troubleshoot anything down the road.
Example.
This is what my Blue Sea looked like when I first put it on my GS for my electronics..
Then my O.C.D. combined with my A.D.D. kicked in and it now looks like this:
That small red wire on top of the battery has since been removed.
You might ask what all am I running:
2 sets of PIAA lights - each one in it's own wire loom
Direct power supply for my Valentine 1 radar detector
Direct power supply for my Garmin 276c
Direct power for my tank bag - It has a dual outlet (BMW and 12V). If I need to charge my cell phone or iPod.
and I have one spare.