Do Your self a HUGE favor go to the 2388. We run all green tractors and have ran green combines until 2001. When Deere introduced the STS select dealers were to seek out low hour 2388,s and trade box,s with them. I bought one of those machines. I ran it until winter of 2003,then traded for a 9660 for 2004 harvest. The 9660 is the bean threashingst machine I ever ran in My life.The new 600 series head allow,s You to run 5.0-5.2 MPH at all times in a bean field, but the electrical problems are sure not worth the difference. When You have to have the Dealer out with His laptop to service the machine You got HUGE problems, especially when the warranty is gone. I traded back for another 2388 with AFX rotor this time. Don,t get Me wrong I like My Deere tractors, but I sure enough like My 2388. Hope this helps.