Yun lang mabibili mo ata with that budget, 20k = upper level HU at semi decent speakers up front.

A complete line of HU, seps, amps for seps, sub, box, sub amp, wiring, deadening will fetch you either 12k for the Targa + V12 budget meal (w/o HU) or up to DLS/JBL/Infinity/Alpine level (w/ semi decent Pioneer HUs) components in the 30-50k level, tapos ang mga ultimates naman...DLS Iridium/Morel/Focals/Rainbow level, eh lampas 70k na malamang, w/ an Alpine or Pioneer HU.