http://www.walmart.com/catalog/product.do?product_id=4694342
the amp is 55x4 rms, its good enough for main speakers, thou i wont run woofer on it. 4 speakers; no problemo.
the speakers, thou im not a fan of pioneer, but if u liked the sound, ive seen many ppl happy with it, go for em, TRUST UR EARS. but these r 6x9 speakers, if the car is honda, u might have trouble fitting these, as rear shelf me 6.5inch round max aata hai, either sheet cut kerni pare ge, ya sheet ke neche lagana pare ga, ager neche se laga rahe hain to ask the shop keeper to temperaroy fix them, so that u can listen em inside ur car, they WILL sound different in the car.
http://cgi.ebay.com/NEW-PIONEER-TS-A6992S-460W-6X9-6-X-9-5-WAY-CAR-SPEAKERS_W0QQitemZ320203436321QQihZ011QQcategoryZ14942QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
i personaly dont like the high frequency response of these 4 5 way speakers, i prefer to look at something more simpler like 2 ways. 4 5 ways tend to be too sharp at times.
good luck