Im getting ready to order a new tractor and just cant deceide between the 6403 JD or the 6603. I really dont need the extra HP that the 66 has but it does have a 6 cyl. instead of the 4 cyl in the 64. Does anyone here have either of these two machines? Thoughts? Also they say you can shift on the go but neither has a power shift of any kind. Im going to be replacing one of my baler tractors and ease of speeding up and slowing down is a must....

Thanks Boomer