Stick with Pioneer for car audio if you like highs and flexibility. I've had Sony, Pioneer, Alpine, and Clarion head units and I've always swore by Pioneer for their excellent parametric eq's. No other units seem to have the flexibility in sound the Pioneers do. I still have the DEHP 4400 with a 892 watt monobloc amp and 2 P.Miller 10" subs. The Pioneer unit IMO is so good I have yet to replace the stock door and dash speakers, as well as the need to add an amp to power them. Go with the 7700. If you need advice, ask the installers what they prefer and use. They'll steer you in the right direction. Alpine is my second choice. Kenwood, JVC, Sony, and the rest just don't hold a candle to these two.