My in-dash speaker solution

Yeah I was doing a search for threads on using the speaker adapter and what speakers people used. There wasn`t very much printed about the actual speakers people used though, mostly just talk about the adapter. Were the speakers most people used 3 or 3.5"? I`d love to know what brand of speakers were used as well as their ohms, watts, and whether filters were installed? I`d also be interested in what fed the speakers? Were they hooked up to mono or stereo feeds and/or used in conjunction with rear speakers? Any input would be greatly appreciated.