as far as the wet okoles, you can buy just front, or just back seat so the back is covered, and you dont have to sit on em. or just buy some $30 walmart covers, and they will work fine too. they are not a custom fit, but may be just fine. WO is the top of the line (for what it is, Neoprene...)
Leather is the nicest for sure, for regular use.
Honestly i could not prioritize it now, but I did all my upgrades to my truck before my daughter was born, almost six years ago. After the campershell, I havent done almost anything but mechanical upkeep since. especially with all the non mechanized hobbies.
Annnnd ironically theres an ad for the 2016 kayaks at 4CRS staring at me as I type..got that new JK Traverse Self support boat I would really like...lol. Priorities.
And speaking of campershells and different storage systems. If you are really talking about a new rig..... get a truck and shell so you can lay your stuff out in back or rig a clothesline from the roof screws. then all your stuff is locked up in back. drying and not stinking up the front.