as long as you have Uni-tanks (conicals that can be pressurized to carbonation levels) you don't really need bright tanks.
As far as dosage goes, I use about 40 ml/bbl. My uni tanks are 7 bbls my bright is 10 bbls and my small brights are 50 gallons per piece.
I have stopped fining my IPA and IIPA. I just let them sit a litttle longer and I think the beer has much better aroma left a little hazy.