i'm considering installing an in dash navi unit. but really don't know where to start. i've done some simple aftermarket radio insallations, so i feel ok about doing it myself. i was just curious about the selection for dash units. and if aftermarket is better than the factory unit. also after the install, would my bluetuooth controls on the steering wheel still work? and what about the dash kit and bracket.

to be honest, not much of an idea about what i should be looking for. i've made an attempt to do some research myself, but cant figure out what will fit and what won't. i'm sure a lot of you have gone though this before, so any thing would be helpful.