I don't think there is a better tractor out there then an E model when it comes to getting work done and staying in service economically.  A tuned 65E will do anything a stock  95 will do.  The only real difference is a little more bore diameter. 

55 should be playing with a 36' field cultivator.  Really, it ought to be playing with anything that Steiger would pull unless he had a chisel which was too big for it.