Does any know who makes the best atv backrest/storage box. I've looked at the Kimpex deluxe backrest/box and also some of the Koplin boxes. I know it's suppose to be used for just resting, but may occassionally be used for a second rider. Mostly around icefishing time in MN. I will be putting this on a 2010 550 xp. So if someone knows one that's better than another, please advise.