The subs and amp were from my old car. For the custom work and labor, it cost me about US$400. It doesn't seem much if you are in the States, but here in Taiwan, it is somewhat expensive, but that is the price you have to pay for the best. Also, this shop has designed a 7" screen to fit in the middle speaker hole on top of the dashboard. The screen costs about US$700.
I don't have the monitor installed yet. But I know that 2 people from the club has gotten it done at the shop I get my stuff done at. I am waiting to see it before I get it done. Supposedly your 555club is going to do a group buy, that is what the shop manager told me.