this is all very confusing. can any one help me decide what i need to get?

i would like to keep my stock head unit so i dont have to buy an steering adapter.

stock speakers are good but if you turn them up with the bass above -4 on the EQ they sounds like crap.

so i need new speakers and i want some bass.

but the stock head unit does not push the power after market speakers need. so what to do there?

and i could just buy a sub and amp but a guy told me that the normal door and deck speakers will all be hooked up together so if i want good sub bass i would blow the normal speakers.

so i need some help. i have a small budge but i want good stuff so if it means waiting i will. i just dont know what to get.

thanks so much!