Kinda an old thread but I thought I'd add my two cents, I've got a Rockford, 10" and it sounds awesome. I don't think there is any difference in the shallow and the standard sized. They just slimmed it down for a shallow box.
Meguires hot shine. It will make it shiny, if you spray it on and leave it, but I've always sprayed it on, then wipe it off right a way. It makes the tires look like the day I put them on. And they're not greasy and shiny.
I've just found this site and it is awesome. I'm having a great time reading all the info on here. I own an 03 Silverado, reg cab, short box. Not an SS, but it still HAULS ASS!!