Y a gotta trry 'pick-up the world' great stuff, and I'd also look at the fishman set-up. I use Fishman in my Vega longneck and have been happy with the soud (it has other shortcomings, but othing unmanageable. I use a pick-up the world pickup in one of my smalll bodied guitars and it is superb; well worth looking into for banjo (I didn't know about it when I got my banjo pick-up).
In short I am sure you'll be thrilled that you can get great banjo sound from a number of today's good pick-up technologies.
look here for pick-up thew world and here for fishman.