u can get any component u want or any speaker , but without an amp , its all going to sound like crap. on a built in setup , u need to get not more then 40rms speakers. secondly , all the new decks have a very powerfull dsp. the loud mode alone can alter sound till about 12+ db. now gaining up 12+ db alone on loud mode then Eq settings (+1 on each gain). then BBE (more db gains) then compression (more db) , how do u think a speaker can handle about 20+ DB gain on just a 25-30rms built in amp!!!! (by the way +3db is like doubling the sound ).
CONCLUSION?
u need to get all the settings down. the the music sound naturally. get the speakers to match ur amp RMS and i think it should play good.