Clarion... :thumbup:

Panasonic... :thumbup: not as good sounding as the clarion... but it would look really cool if you got the Panasonic and added an aluminum trim kit to the car!

Kenwood... :down: It sounds ok, but is very hard to work and the faceplate is built like a childs toy... very cheap!

Time delay is also known as a Listening position selection, meaning you can actually control when the sound goes to a particuluar speaker... you even out the timming as to which the sound reaches your ears, making it sound as though you are sitting directly between 2 speakers... meaning better soundstaging. My alpine has this feature, but I never use it...