I will find the online articles about the $1000 range riding mowers and steel decks and post them. I agree with scott. However, I was referring to the less expensive riding mower stamped decks. Some stamped decks are made of heavier guage metal and are comprised of more steel. Others are thinner and have less steel and more alloys.
Many have reported that some late model riding mower decks warp or bend too easily. When they attempt to repair the deck by welding them, the weld will not hold because they are made of less steel and or the decks are thinner than older models. Some of the late model riders with those types of decks can be found at home improvement chain stores. I prefer to not make negative comments against a specific brand, as people often take negative comments about their property too personnal.