What battery is the toughest to put in a buggy that will cop a flogging. Does not really bother me how much it is I just want one that will not die at the first site of a set of corregations or as soon as the warranty has run out. Will be starting a subi motor and possibly running a winch for when the shit really hits the fan.
Try Your closest JOHN DEERE agricultural tractor dealer.
John DEERE Make one of the best Batteries available in the USA. the plates are attached at the top & bottom to stop them collapsing...
John Deere "STRONG BOX" Batteries....
I used to sell them....
Lee
Don't know about brands, but a maintenance free battery sounds like the kind of thing you need. They are all fairly similar in construction so just
go for a name brand. You could try 4WD shops. I know Exide does one called Orbital. It doesn't have water in it, instead the electrolyte is a gel
and the plates are a mesh. These batteries are supposed to be very resistant to vibration, and of course require no refilling.
Then again, Lee's John Deere batteries sound pretty good.
optima batteries are awesome, you can mount them on their side, upside down, they are really good, good for offroading aswell
Similar to the optima, look for maintenace free gel cel batteries also. 
delkor make goodones aswell
i was part of a bit of a discussion on something similar a while back.
try this on for size....
http://www.aussieveedubbers.com/forum/viewthread.php?tid=25472#pid203242
no battery likes vibration, but after working, installing and maintaining odyssey batteries i vouch for their reliability, as long as you charge em
right!
haha, i also used two dead tractor sized ones to as axle stands for the company forklift one day! haha, under the rear end where all the weight is and
the fuckers didnt collapse!
hahahah
good luck with it!!
Yeh after a bit of reserch and pricing it does look like I will go the way of the odyssey.
use an Odyssey, thats what I use in a race car and the old 360cc jeep I have..... the only battery I will take off road
optima are ok but I have had to many warranty problems with them before I started using Odyssey, now I wont go back.........
You'll also want one that has a cold cranking amps rating of at least 500 CCA to handle the Suby motor and occasional use of the winch.
remember what i said about charging them though!!!! its imperative for long life with the odysseys and they dont honour warranty claims if they test the battery and find its been undercharged!! i think it was 14.5 volts or better from memory....its in the booklet you get with the battery, page 9 i think...