So if you go with Duratracs, that's less of a chance you'll need to re gear as the nittos and Toyos are as heavy in a 35" as most 37s. Duratracs weigh 64 lbs in a 35" and nittos weight 79 lbs. the less weight your motor is pushing the lease chance you'll want to re gear.
I have the duratracs and love them. Haven't heard one negative comment about them.
Also when lifting higher than 3" your going to need a new drive shaft sooner than later.
And hopefully your lift comes with all the other things needed to lift that high.
2.5" is really ideal for 35s and you don't need much else other than lift shocks, extended break lines to run this set up. I been running it for a year with no issues.
And yes you will need a new tire carrier. Although I've heard people shove a wheel spacer on it and the tire fits. Also seen a guy that put washers on the bolts enough to push is tire out enough for it to work.
Good luck. I'm sure more people will chime in with more info.