The perfect pass is about $1100 without installation. I would figure another $300-400 for installation depending where you go. If you have time, the install is pretty easy and you could save yourself that 300-400.
I replaced the paddlewheel housing unit and it was fairly easy. But everything else that comes with it seems to be very difficult for the average guy to install.
Initially the box of parts can look intimidating, but if you read the instructions several times and lay the parts out as you do it I think you will find that its not really that difficult.