If he is replacing an optima I can find Kinetik for about the same price online as I can find optima local. CHEAPEST I can get a group 31 optima is about $289, cheapest yellow top now is $209. I can get a red for 159 but I wouldn't use those with an audio system already learned my lesson on that once.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifwhy do people suggest ridiculously priced batteries for people who are not looking to gain .2 db? especially for a main bat? I have never understood this.