Having the 6 spd you can run 4.88's and 35's, but be careful the D35's and 35" tires are not ideal at all and you are pushing the boundaries with the D30 as well.
Shop around and make sure they know what they are doing or you'll be redoing them again.
Try and find a D30 HP out of a late 90's Cherokee and a ford 8.8 or dana 44. It's much easier to regear, add lockers, bracing/truss and etc. when they are already out, then it's a matter of swapping everything out over a weekend with a buddy. This way you get much stronger axles and your vehicle isn't down for a long time. You can sell the old axles to get some of the money back when you're done.
IMO it's a waste of money to regear the D35 and LPD30 if you are running 35's for any serious off roading. If it's a mall crawler then you'll be fine.