The weak area with the D35 is not so much the shafts, as it is the housing. So if you put in the super 35 kit, you are then making the weak link the housing and gears. There is really no way to make a D35 strong enough, even if you put $1500 into it.
If you are hell bent on locking up that 35, put a lockrite in it and save your coin for a better axle.
I can build you a semi float D44/D60, TJ width, for pretty darn cheap.
As for E Lockers, the only Dana axles they are made for are D44 and D60, so those are out. Also, they will only warranty them with stock size tires.
OX lockers are junk. There are only about 3 people I have ever talked to (on or off) the trail that likes them. All of them I have seen on the trail have not been functioning and the owners hated them. I take that back, I just saw one on the trail recently that worked, but he does have to keep adjusting the cable.
ARB's are much better... I've only seen a couple not functioning, and it was becuase of poor hose routing (too close to exhaust, getting hung up on rocks, etc).
I also sell most of the lockers out there
I'm in WA, so no sales tax for you