hi, for rm500, just get a good set component 1st, how can you aspect incress in sound quality with just change the Hu witout speaker
the rm500 for speaker is more improvment than change a rm500 Hu for 1st step, ofcause and comfrim . and just try to put all your rm500 for a good component speaker set 1st than no need to change again, just need upgrade next time. for that budget can try the forum somebody selling autocraft Mbquart Dsd216, or a jbl 6506, but rm500 for Jbl6506, you need to find hard.