Okay I'm getting these subs: http://www.hifisoundconnection.com/Shop/Control/Product/fp/vpid/5849009/vpcsid/8188991/SFV/30046
With this amp: http://www.onlinecarstereo.com/CarAudio/p_23917_Hifonics_HFi2000D.aspx

I'm putting them into a '93 S10 blazer. Everything in the blazer is stock and I would like to install an aftermarket head unit. So, could someone please give me the links to everything that I need to install the head unit? Also I would like to be able to play my iPhone through USB if possible. Thank you!