The stock Nissan battery is having cranking problems when the engine is cold and is just getting worse. So is there any reason to spend about $30 more on the wacky looking Optima batteries that seem to be so popular with the car audio crowd? From what I researched the yellow tops can be fully drained and then brought back to ful charge with no degradation of the cells. All I have is 2 amps, (1) 12" sub with a total of about 1050 wrms. I'm also looking at Interstate and Die Hard Gold.