upgrading stereo to include MP3 player - which application is all around better - "front plug in" or "docking station" - what are "pro/cons"
There's an article on the site that might be able to answer a few of your questions.
Regarding plug-in vs docks this is what it says: Auxiliary jacks require you to maintain access to the MP3 player. Your iPod is safest inside of a stereo with a watertight docking port.
A docking station secures your Ipod or Mp3 player; A plug in is simpler and generall cheaper, but leaves you to figure out how to secure your player.