If you haven't read Skinnee's excellent pump top comparison go read it here
http://www.skinneelabs.com/
I just got a DetroitAC top myself, however I can't tell you how good it is because I don't have the system built yet
The only slight disadvantage, compared with the EK top for example, is that the EK top allows some flexibility in the position of the nozzle fittings (at a minor cost to performance).
The other advantage (and additional expense) with any of these is you can fit your own choice of barbs or compression fittings. However note that the 'low-profile' Koolance compression nozzles have a very short thread that is far too shallow to engage properly with the screw thread in the DetroitAC top (I found this out the hard way).
http://www.skinneelabs.com/
I just got a DetroitAC top myself, however I can't tell you how good it is because I don't have the system built yet

The other advantage (and additional expense) with any of these is you can fit your own choice of barbs or compression fittings. However note that the 'low-profile' Koolance compression nozzles have a very short thread that is far too shallow to engage properly with the screw thread in the DetroitAC top (I found this out the hard way).