@Dawar: if u need a complete balance of sound like crystal clear vocals,good bass (usually this is prferable for movie watching) u can get this stuff
1. kenwood 718 for the rear (one pair )
2. kenwood s720p components for the front ( 2 pair or 1 pair) coz one in the front doors,second in the rear doors but u can get normal round spkrz for the rear doors,coz it would create a surround system ( 1 spkrz at back ,1 components for front , 1 round spkrz for mid just to fill the sound)
3.pioneer 308d2 subwoofer
4. get a good 4 channel for the sub and one pair of spkrz
5. get another 4 channel amp for rest of the 4 spkrz...