I just bought a M101A 3/4 ton trailer and need to by the pintle reciever for my FJ. I see there two styles, the hook and the ball-combo. The ball combo beinbg about $110 and the hook about $60. Besides price is there any advantage to one or the other? I have enough normal receiver hitches so I am not sure I need to pay the extra for the ball-combo. Looking for advice on towing using the two styles, any information would be appreciated. Thanks in advance.