Audio Questions, Im a dumbass and need some explaining Options

[Serhey]

so this isnt necessaraly for now, but i was thinking after i get my interior redone i wanna work on the audio system in my car. and well i know absolutely nothing about that stuff. i mean like what brands are good and what should i look for? what are the sizes and if i buy the right size can i just replace them, im hoping to do this all by myself. i dont think its that difficult its just im so foreign to it that i dont really know what to do and dont want to get ripped off if i try to buy the stuff at a store. i dont want to spend too much but i want a pretty good sounding system. what can i do to get good bass? i dont want to put in subs in my trunk. thanks.

[Remanight]

For the head unit, try and stay away from pioneer. They seem to alway's end up blowing the ground in the back of the unit and there's really nothing you can do about it, apparently made like that.
It recently happened to me, i had a pioneer Mosfet DEH-1650 it was a great head unit, but all of a sudden i could hear my engine sounds through my speakers. I went to go buy another one, because
i was certain it was something else, until the bloke at the shop told me pretty much all of pioneer's have the same problem. So i ended up buying a JVC head unit, and i couldn't believe after i installed it
how much of a difference it made. It's perfect at the moment, and couldn't be any happier. So im just pretty much here to tell you to stay away from pioneer, or at least it's a word of warning =]