they are not too low, but you need a 44, 60, 9", something else up front to run 5.13s. you cant stuff em in a HP 30, i heard there were some for JK30s though? or maybe LP tj 30s at one point?
If I could I would do it in a heart beat. By the time you add all the weight to your rig (cage, 2x6, plate frame, bumpers, winch, fully belly, 37s, etc) you will wish you went as deep as you could have gone. youll be off those 33s and up to 35s before you know it, then 37s.
I would imagine the 5.13s with an auto and 33s would have tons of power, it would be nice. I had 33s for a long time with the 4.88s . Was way more power than the 35s. wish I had 5.13s or 5.38s....
im assuming you are building a 44 (waggy, ford, or TJ) or something like that to actually use 5.13s so your rig will be ready for 37s before you know it...