Kahuna,
Until someone writes a specific review of the 7500/7700 you might want to research reviews of ATI's 2005 and 2007. The Outlaws and ATIs appear to be identical from a performance standpoint and there are other posts that note they really are the same amps. I've owned my ATI 2005 for a couple of weeks and I'm very pleased how it works with my 990. Sound quality?? Well the 990/2005 combo just overwhelms my Pioneer Elite receiver. I'm no critic, but my Elite sounded thin to the full sound of the 990/2005. It was that thin sound that started my upgrade to my current speakers and 990/2005. My move to seperates was pretty dramatic and after the setup was done there never was any doubt the Elite was headed to eBay. One last observation: I'm listening to 2ch music after a long drought because of the quality of these components.
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AvFan
Outlaw 976 | ATI 2005 | M&K 850s Left, Center & Right, Surround-55s, MX-70B Sub | Harmony 950 remote | Panamax 5100 | OPPO UDP-203 | LG OLED55B7