Wow I can't believe I found the thread I was looking for.
I did used to run a Flubal 405 and my LFS swears by it. I found it to be a nitrate factory and now only use it empty to push water through my UV.
But I did find this thread where BOOMER made a recomendation. The topic was actually carbon but he talks about the way the water flows through the filters and for that reason I would go with the one he recommended.
Here's the text and the link for more reading.
My method of choice is only one. A powered canister filter and only a Eheim. It has what I will call a "positive flow" filter. Meaning, water only enters in from the bottom and must go out only from the top. Many of the newer types the water enters and leaves from the top. These types often have "self-propagated" by-passes. If the media gets plugged the water just passes around it , often with little flow lose ( i.e.. Hagen Fluval). In the Eheim the flow will slow down and maybe even come to a complete stop, if left unattended, as water is forced to go through the media. It does not have these channeled "side-walls" like others, where water runs down the channeled side-walls to the bottom and the up through the media to the top of exit or vise-versa. You could also make your own canister with PVC and jsut get a small pump.
http://www.reefsanctuary.com/forums/polls/9262-active-carbon-2.html