Welcome to ECF and the ProVari club.  You have you taste and, imho, you have made a great choice in pv.  There are a number of good tanks available that will work well with your ProVari. Vision Vivi Nova, The Drunker Tank, ProTank, are a couple that come to mind.  The eVod, which requires a eGo to 510 adapater is also an easy to use and nice looking tank.  There are cartomizer tanks available, but I am not a cartomizer gal, so really can't help much when it comes to cartomizer tanks.
Glad you found us, you have joined a great group of people here at ECF.
Happy Vaping,
Paula