The best replacement for 33s is 31s.

The best alternatives to 33s are rated as following:
★★★★★  31s
★★  45s
★★  hp35s
★  35s
★  35s hp
★  78s
★  32s
★  hp 35s

Your alternative for 33s is not listed? Suggest!
Speaking about 33s, one probably shouldn't forget about 2 inch lift.

Other search terms related to 33s and their ratings are:
★★★★★ 2 inch lift
★★★★★ 4.10 gears
★★★ 20s
★★★ 2.5 lift
★★★ 6 inch lift
★★★ 3 inch lift
★★★ 4.56 gears
★★ leveling kit
★★ 3.42
★ 18s
★ dana 35
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33s
31s
45s