I am shopping around for a ZTR with a deck size of 42 or smaller for residential lawn. My yard is mostly flat and less than 1 acre and I will be using mulching kit. Here are some of my options. Hustler sport 42 with 17.5Hp B&S $2800 (new 2009 model) Gravely ZT 42 with 18.5HP B&S $2500 Toro TimeCutter Z4235 22HP Kaw Twin $2600 Simplicity Axion 42 21HP B&S $2600 Is it better to spend more for a better engine or better to spend more for the welded steel deck and frame? I dont want to get into the $4000 price range where both features come together.