Killer band, I love trios. I assume you're going to have a tone pot, you'll need one for the capacitor to have it's effect of course. I'd go with a .02 (some are listed as .022) with those pickups.
As far as the type of capacitor I like them all really, after listening to your band I think either a ceramic or a PIO would work, the difference is a PIO is a bit smoother/sweeter sound and the ceramic a bit more raw sounding, these differences are subtle in a band mix.
Enjoy those C-bombs, :)
WR