Take some time and research the good the bad and the ugly. Also find out what you have in your area as far as dealers and how good or bad they are. Sooner or later you will need parts or service so factor that into the equation especially if you are going to buy a used machine. Also consider resale value.
http://www.tractorhouse.com/ this may help you with values along with your search
http://www.mytractorforum.com/ they have both Cut & Scut sections
http://www.tractorbynet.com/ they have both Cut & Scut sections