I currently own a 2018 X590 with 48A deck and powerflow 2 bagger. This is my second X590 (2015) and previously owned an X540 (2102) both equipped the same (48C deck and powerflow). I use it only to mow the yard at the farm. The 48A deck does a better job of cutting grass than the 48C. My only complaint with the 48A is the method to remove the drive belt (3/8" ratchet needed). At the farm I have about two (2) acres to mow with many "obstacles" and the terrain is not very level. With a 54" deck I would end up scalping many areas and not being able to mow in some tight spots. It does seem to use slightly more fuel.