Optima Battery?

[we350z]

I hear one exists but I can't find on their site or anywhere else? I am pretty sure my OEM is toast after 9 years of service. I am trying to charge it one last time, we'll see how it goes. The car has been sitting a lot lately, I'm sure that did it in. It already appeared to be a little on the weak side. I'll check to see what color the little dot is too, but it's such a bitch to get to I figure If I am to unbolt all the shit then i might as well just replace the damn thing.

Any options > 850CCA / 1000CA for the 2000 X5 4.4i? I am planning on doing a heavy sound system. Otherwise, I am thinking I will probably go with the Duralast 49-DL for $95:

http://www.autozone.com/R,APP333662/...ductDetail.htm