pioneer has best displays but only buy with original bill otherwise u might get a defective or duplicate piece...
ur budget is low end so u cant go for components which is the best option for good quality sound sys
i suggest go for 4" coaxials in the front(sony xplod) and 6X9" coaxials(JBL) at the back...though to be honest u'll get only above average sound from this setup
for a good quality sound u got to include component speakers in the front and an amplifier....but that will definately shoot ur budget to arnd 25K
ENJoy...