My main bass right now is a sunburst VJ-4 with a grenadillo fingerboard, and I'm absolutely in love with it. It's passive, so I can't be much help with the electronics options you're interested in, but I can say that I do enjoy the bart pickups. Very natural sounding, while maintaining lots of that jazz bass growl at the same time.
Mine is a very comfortable light weight, although I've heard that some can be a bit on the heavy side, so check the weight of the exact one you're getting first. As far as playability goes, I've yet to play an instrument that I like better. Nice low action, and the contour of the neck feels perfect in my hand. Overall, to me, it's a very slim feeling neck, with respect to width and depth. Everything about it just feels 'right' to me. And my favorite part about the graphite neck is that it feels that exact way every single time I pick her up, no matter what the weather here in Upstate New York is doing.
The last thing I'll mention is that I've found Modulus' consistency from instrument to instrument to be excellent - I've yet to play one that wasn't outstanding in the construction/playability dept. Whether or not the sound does it for you is another story...
So, as you can tell, I'm rather positive on these. I guess that's enough rambling for now...good luck.
Regards,
Dave