Re: Would this be a good
Here's the options I'd consider:
JB/Duckbucker/Jazz - a great combo, IMO, but might seem a little too crowded on the guitar. Not really a problem, but some people don't like taking up that much room.
To make the guitar look less "busy" you could opt for a lil 59 in the neck for a HSS look.
Otherwise, you could drop the Duckbucker and go JB/Jazz, though you'll lose a bit of your versatility.
Personally, I like the idea of the Duckbucker in the middle. You'll get that stratty single coil sound, hum free (I guess for another option you could go with two Duckbuckers).
I don't really know which way to tell you to go. I don't even know what I would do personally. My Jackson has a JB/59, so I'd probably go with a Jazz in the neck and maybe the Duckbucker. If I didn't have my Jackson, I might lean more toward the '59.
If you're leaning toward the lil 59 and duckbucker, go with your gut. Either combo should get you pretty close to what you're looking for.
I hope I haven't confused you further. When you decide for sure what you want, we'll hook you up with wiring diagrams.