Hi! Share ko lang opinion ko. 30k will give you a good and moderate sound system. Mag 4 channel amp ka (Orion) configured into 3ch. meaning, front channel will power your seps. (DLS) and the rear bridge into a single channel for your sub (JL) Heres the details:

Head Unit:stock
Front Spkrs: DLS MS6 - 9500
Rear Spkrs: wala
Subwoofer: JL W0 or JL W3- less than 10000
Amplifier: Team Orion 4 channel- less than 10000 (i think)
All of these items are readily available kay MIckeys Autosound Sa Santolan Pasig (malapit sa South Supermarket)