2004 GTS Infinity stereo question

[NYRangers11]

Hi,
I posted this question in the electronics/audio forum but could not get any answers. I have a 2004 GTS with a infinity sound system. One of my front speakers broke and I figured this would be a good time to upgrade the system. I want to install a new head unit. I was thinking of keeping the amp that is in the car. What are you suggestions, is this a good idea to keep the stock amp? Would the following harness' be good ? C2R-MIT or Metra 70-7003 ?

Also I read that the stock speakers are 2 ohms. If i wanted to replace the front ones, do they have to be 2 ohms as well?

All help and recommendations is really appreciated. Thanks.

[9Ggts]

Hi,
I posted this question in the electronics/audio forum but could not get any answers. I have a 2004 GTS with a infinity sound system. One of my front speakers broke and I figured this would be a good time to upgrade the system. I want to install a new head unit. I was thinking of keeping the amp that is in the car. What are you suggestions, is this a good idea to keep the stock amp? Would the following harness' be good ? C2R-MIT or Metra 70-7003 ?

Also I read that the stock speakers are 2 ohms. If i wanted to replace the front ones, do they have to be 2 ohms as well?

All help and recommendations is really appreciated. Thanks.

visit g9gnation.com there is a wiring guide for installing aftermarket head unit to infinity stock amp on 2004 LS. not quite sure if LS and GTS have same wiring guide.