Just got back from getting a new HU. I got the Alpine #7871 installed and it makes a great difference from stock. I definitely need a subwoofer since the treble has increased dramatically. I didn't get the most expensive unit since I'm easy to please. If anyone is thinking about it, this Alpine is better than my last Pioneer and Kenwood, so far. Get one. You guys had some good input on my decision. Thanks. R/S Dennis