I replaced by myself the stock head unit with Sony Xplod CDX-GT470U using Metra installation kit and wiring harness. The head unit is not the best one but at least it's far better than the stock and sufficient enough (deep & powerful bass) for daily use. I'm surprised the stock speakers is quite powerful ;) After all, I was looking for a unit with front AUX-IN & USB (I simply stick my USB flash disk), and this unit suits me in. It doesn't cost much as well ;)

Other data and pictures are coming soon. Check back.