Lookin for some Z28/SS info

I'm looking to buy a Z28 or maybe an SS in the next year. I use to stay ontop of all the info on Chevy's, but haven't had the time lately. Does anyone know where I can get some info on the 1LE package on the different years? I also saw how a 10 speaker and amplifier option was available back in '02. Is this worth a crap or is it better to just put in a decent system. Anything else worth knowing about these cars?

This site has a lot of info. on the 1LEs. (http://www.1le.net/)
Fourth gen. 1LEs are pretty rare. In 1999 it was discontinued then brought back in 2001 by SLP, so it was offered only on the SSs then.