Salaam Humer ,
well well yaar u r putting too much on your head , pls relax and be calm ,,,, im here to help u in my point of view ,, well see first of all this is focal fan club mean its a brand oriented thread or ppl who love the high end audio brand in the world but for this stage you'll have to start your journey from scratch otherwise u cant understand anything .. as i'd started it from just basic setups many years back and den after passing time i learn t the funda of car audio.... or music .....
well dnt worry its normal and its all about your wife car .. first of all wats da demand of your wife in car audio department like she want lound music or normal or clean or with light or heavy bass (punchy bass or thazzz thazzz heavy bass) ... if your wife just want a music system in car when she want to listen normal music just put usb or cd in Head unit ....den go for any basic pioneer kenwood jvc Head unit with Usb + Aux in + bluetooth options(if u want BT) with normal price range between 10 to 20k and get normal speaker of kenwood pioneer or jvc what ever u like 6.5 or 6x9 as your car cutting or speace available ... it 'll be fine for your wife cars ...
well in case if she want louder with bass and want clean distortion free music ... den it'll b the diff story mean component and amp and woofer RCA tuning sound damping wiring alaa bala etc etc ...
now tell me at this stage what u feel dat actually what u want or looking for if u still looking for more let me know i'll guide u more Inshallah ..... u can see my setup in previous pages ,, i've put all high end product and costly as well but for me its still basic setup in high end setup as i still need to tune it more and more to get maximum output or what ever u call it ...
so now its up to you ... what u want and how u want ... so let me know if u still want to know more ... im here for you ...