Pardon my ignorance but what is DSP? Also, I went to automarc today. It felt like the guy knew his job. He suggested me to go for a new HU all together. Got a general quote from him. Pioneer HU DEH 8350 (my choice) -9800 Front Components (pioneer) -6500 Rear Speakers - 3000 Amps + Cables (focal most likely 720 W) - 7500 Subwoofer (Pioneer/Rockford) - 7000 TrimKit for Punto and connector - 1800 Total is 35600 including installation. How can I bring it to under 30 grand? Also, if anyone knows this guy can some discounts can be obtained? I want an aux output and for that he said that the equipment would cost about 7K so its better to get a new HU all together. Kindly suggest me what to do? Thanks in advance.