Yes you can run 35s on either. The gearing may be a bit low depending on your choice of trans, but initially it would be okay. You would want to regear to 4.56 or 4.88 eventually. If you can get a bolt in TJ d44 shipped for a grand, go for it. You can build an 8.8 for less than 500 on the cheap, or spend way more if you want. That means fab skills and materials however, plus time. The 8.8 is a bit stronger than the d44, particually the shafts. The R/P are supposedly the weak link on the 8.8 where as the U-joints on the d44 would eventually be a weak link that couldn't be upgraded without some really crazy axle modification. If you plan on running 35s, either axle should be fine however, in stock form.