Heres my opinion...and since I have both Hertz and AudioFrog in my Jeep, its an honest opinion.
I run an active 3 way front setup using Hertz Mille 280.3, 700.3 and the 1600.2s. Powered by an Arc Audio XDI 1200.6. Then I have 2 AudioFrog GB12D2s in my trunk powered by their own Arc XDI 1100.1...