I am ready to pull the trigger on a king cutter rotary cutter. The dealer is saying to buy a 5 ft some forums say either will work. So I thought I would come here for the final answer. I am not looking at the XB cheaper series. I have tall weeds/grass. Some brush. I dont want to put the hurt on my 1720 but would like a nice cut. Price is $50 more for the 5 foot. Can the 1720 handle the 5 ft with the almost 20hp pto power without issue or should i go with the 4 foot? I do have some off camber and slight hills. Thanks!