Looking to replace 2001 Rudd 120 gallon tank. Rudd/Rheem were preference but told no product is available. A.O. Smith only. These will be under their “light commercial” division. I understand warranty is shorter but not an issue. Just looking for an easy transition from old to new. Any information on the no product availablity or the use of an A.O.Smith. Thoughts. Thxs.