I think a L3901 HST to get around the tight places and a L6060HSTC to do the bigger stuff. You get the small one to enjoy the nice days and the big one with air and cab for the hot dusty days. Anybody else?
Those aren't too much different size wise. What are you planning to do with each tractor? If I had the option of two tractors I'd try to cover all my uses a little better. Like get the L6060 cab tractor for heavy work and maybe get a BX or a larger B series for mowing, working around tight spaces and or small backhoe work. Just my thoughts. Either way I own an L3901 and love it. It's a great tractor.