That's not quite what I was saying. My point, was that if you looking for cosmetics, the 7125 would be a more than equal replacement for the GFA-6000, because as far as I can tell, the 7125 has more power and cleaner power than the GFA-6000. I should have stated this more clearly in my original response, I am basing this upon Outlaw's and Adcom's published specs (reentered below).

7125 - 7 x 125 watts RMS at 8 ohms, all channels driven from 20 Hz to 20kHz with less than 0.05% THD

GFA-6000 - 3x100 watts continuous average power at 8 ohms, all channels driven from 20 Hz to 20kHz with less
than 0.09% THD
- 2x60 watts continuous average power at 8 ohms, all channels driven from 20 Hz to 20kHz with less
than 0.09% THD

However, it is your choice, and you are in the position to do this one step at a time.