Just to throw another choice in the mix, Exide makes a rather nice battery. IIRC one of the main engineers for Optima went to work for Exide back in the day. I have run an Exide Orbital, Optima Yellow top, Diehard platinum, and am currently running a Duralast Platinum in the Xterra. All are decent batteries. What is dumb about the yellow top is you cant use the side posts for winch cables, they have to be connected directly to the top posts. The Exide allows you to run winch cables from any of the posts... I think the die hard does as well (dont quote me on that). The duralast battery I have doesnt have side posts, but my guess is its comperable to the Optima brand.
Call me Eddo
13 WK2 Trailhawk