It depends on you. The 4.10's are perfect for 33's. What I did (best bang for my budget) was found a Dana 30 out of a 4 cylinder tj in Craigslist for $200. Its direct bolt in.
For the rear there's alit if choices but I went to a junkyard and grabbed a ford 8.8 with 4.10 limited slip. That was $150. Cost me $300 at local 4x4 shop to have it rebuilt and they added extra shims to tighten the limited slip, and to gave the welding done.
Have run these for 3 years now hard too.