I am new to this site but from reading through some threads, I have narrowed down my search for a 60" Zero turn to Scag or Exmark. I am mowing approx. 4 acres at my home. Nothing more, as in commercial work. I do want something to last a long time. I'm sure they both will do a great job. I've seen both. I was at the Exmark dealer and he told me he use to carry Scag and Ferris. He said the biggest problems he had with them were getting the pumps overheated. He went on to tell me that they both use a 10w30 oil in the pumps, so they need oil coolers. Then the fans draw dandelions and dust.... into the cooler radiator and if they are not kept clean, the pumps will oveerheat and burn up. He said the Exmark uses a synthetic oil in the pumps and does not require a cooler because of that. Please help with any and all advise. Both mowers are in the $8700.00 range. It's a lot of money for me, but I want to be the best the first time and not have to worry about these sort of things, right off the bat. I know things happen and can accept that, but with all the knowledge and experience from you folks on this site, I'm hoping to hear your advise on these two machines. Thank you in advance, J.R.