On the Villex "Classic" (what you can see on the website
www.villex.com) you can have either the SC (single coil) or the LH (linear humbucker) J models (
http://www.villex.com/pickups.html). You probably need to contact Villex for the fine differences between the two models. I have the LH installed on one of my basses (along with a soapbar Villex) and I am most happy.
They come with the mid-control. You need to wire your vol/vol/tone or vol/balance/tone.
The PRTB is extra and can be combined either with Villex (not that they need it, but I am most happy that I have incorporated that too on my Villex-loaded Voodoo Dingwall) or with any other pickup that the bass would benefit from a low mid and lows boost, at the expense of highs.
PS I am not affiliated in any way with Villex (or with any other product I may be supportive of). I am just a very demanding customer (and hopefully I have gained a bit of knowledge and wisdom in my quest for tone)