I had the cat filter. It seemed to work well. I switched to the racor setup because I like the see through bowl and water drain, and I wanted to get rid of the old filter head. Of course shortly after they came out with the new filter head...

I think most have had good luck with it. I like my racor setup though. That reminds me, I need to order a new filter.
If you decide to do the racor, pm me and I will send you the plugs you need described in bio hazard's writeup. I had to buy several and I have them put away somewhere in the garage.