90q speaker upgrade question...

[alan pritchard]

Hi guys, currently i have a reasonable head unit and disc changer, the head
unit is 4X40 Watts, and i also have a sony 5x50 w amplifier (not fitted), I
am looking at completing the package by upgrading the standard speakers, the
fronts appear to be 5" full range units, whilst the rears are a 6" driver
and seperate tweeter, therefore will the car take non factory fit speakers
of this size, I have about £200 top spend on the setup, and i wont be
running a subwoofer, whats the best way forwards? Does anyone make an
acoustic shelf for this car? (therefore i could fit 7x10's, although it
would probably involve cutting).  Is it plausable to get a godd quality
sound with a bit of kick from this setup? I am used to using components
upfront, 6x9's up back and a 10" or 2, 8" subs in the boot.
Thanks guys