You ever going to cycle it on purpose?
I think the biggest East penn Deka Intimidator or rebadged intimidator you can shoehorn in would be good. these are relabelled by some autoparts stores and by Sams club and Costco.
If you really wanted high CCA ratings, Northstar And Odyssey. these also have very low self discharge as does lifeline who do make dedicated starting batteries, or at least they market them
Batteries PLus sells NorthStar as X2Power. Nationwide, 4 year free replacement warranty. Not cheap.
Don't think Sears still has their deal with Enersys regarding the odyssey/DH Platinum. Don't think sears will be around in 4 years.
My Northstar-27 needed an initial deep cycle and high amp recharge before it would rest over 13v. Still rests at 13.06v Performing well in double duty as house and engine battery, but recharged very well too. I am around 400 deep cycles and closing in on the end of my third year with it. No 'just as new' claim from me, but still performing very well. I'm impressed with it so far.