for cheap but decentcomponent set look ^ SSL 6C they are good lil speakers. as for a hu im running the jvc arsenal series 7500 & i love it. great set^ & its has a 7 band eq built in ! as for a 4 ch. well the speakers are abou 70 shipped @ best. and the hu its around 140 ish. then i'd run the sundown audio SAX 100.4D great amp