hey man today i installed front 4" speakers in my cultus,
there are different speakers available in 4 inch size
if u really want quality then go for fusion or sony xplod ....(u can get it from liberty if in lahore)
if you want just moderate sound with no more exta bass and quality then go for old speakers which come builtin with cars from company and people sell them to dealers and upgrade to some branded ones...
you can get them in the range of 800-1000 (i have installed them)
and kenwood & pioneer are available in 2000-3000 range
and chines ones are available <500 (craps one) ....u can use them just for listen naseebo laal
and the wiring is already done ....al u have to do is to connect them with the pre