Well, in a situation like this, with the VT Deluxe, it allows you to utilize both inputs, as well as allowing you to assign the effects in the loop to specific presets.
That actually makes a lot of sense. I didn't realize you could toggle the effects loop on and off (just re-read a couple posts back and noticed that I missed that in your initial post). Since I would be running three pedals in the loop and they would never all be on at the same time, the ability to toggle like that would be no benefit to me, but it's definitely a neat idea.
It sounds like I need the "Bass-VT Deluxe Pro"
That'd be the Bass-VT Deluxe with the addition of a pre/post switch for the DI a series/parallel switch for the effects loop and most importantly a robotic arm that could make me drinks and small sandwiches for those between set munchies 