Before spring ,I need to purchace a mower to cut my own lawn as well as 5-8 others that have been offered to me.I am new to the business and have a few questions about walk-behind mowers. I have been talking with several people in the business and keep hearing EXmark!! - What is the difference between a fixed and floating deck, and can one cut a lawn with a few ruts in it better than the other?( Two of the lawns i will be cutting have a few uneven areas in them caused by water). -Hydro or belt drive for slight hills(not too steep)? -How do i figure which size mower to purchace?I am debating between a 36" and 48". (no gates or fences to get through) Is there a "rule of thumb" to go by as to how big of lawn and what size mower to buy? - How is the EXmark 21" i also want to get a smaller mower as well for trimming and tight spots? - How long should a Walk Behind of this quality last for my own lawn and a few others? Any idea? - What is involved maintiance wise for these type of mowers? Thank You for all your help!!!! The only dealer i asked these questions to just wanted to sell me something right then and there and not just the right mower for me!!! He new i didn't know anything about mowers except that i heard Exmark was good and i had some money to spend!