Q's on putting in 2 Batteries

[87sunsport454]

I have a 1987 sunsport w/ 454 in it. I am going to install 2 batteries in it this weekend. I will be using the 1315 Sure Power that everyone is using. I am wondering what kind of batteries to use in this application. I am on a budget so I was thinking of for know buying one Optima Gel Cell. So I guess the Question is do I use the Optima for the Starter or the Stereo. Also what color Gel Cell. I was thinking of using the Red top for the Stereo but I dont know. I have heard that people like to use the blue top but that just seems like to much for what I need. I am only hooking my Stereo to it I have no amps or anything that needs lots of power. Just have Cd/Mp3 and 4 Alpine speakers. Also some tips on how to hook up the 1315. Thanks

I am going to post up some pics to. I have been meaning to so I am going to just do it here.