No question go with the 7800 it's reliable proven technology and the parts and filters are now available after-market much cheaper than current Kubota Production Models....
My wife and I are considering selling our Kubota B7800 with Kubota 60" midmount mower. We purchased it new in April, 2005 for $15,762.00. We have since put 130 hours on it with zero problems. Stored indoors since new, it is in showroom condition. Used for mowing duties only. Our property has increased from 1 acre to 11 and have recently purchased a larger tractor (Kubota L3400). No front end loader however so this message might be a mute issue. If interested, give us a jingle. Jim and Robie Walker, Cambridge, Ohio jimandrobie@hotmail.com or send private message. Thanks