So I put Barden J5 pups in my Roscoe (ok, Packard put the neck pup in) and really like them so far. The Barts were really nice, but as they say "curiosity killed the cat". My initial impression is that they have a very even string to string response, they are clear and articulate and full sounding. Oh and they respond very quickly. They have a single coil-ish vibe and are a little more raw than the Barts that were in it also. I'm playing in a group setting tomorrow, so I'll have a better idea of how they sit in a mix. The Barts sat really well, so we'll see, but I have a feeling they will really shine. Anywhoo, here are some clips taken on my Flip cam. They are not the best quality, but you'll get the point. Hopefully I can get a better recording rig soon.
Here are the youtube links:
Roscoe bass/Barden J5 neck pup sound clip - YouTube Roscoe Bass/ Barden J5 bridge pup clip - YouTube