Hi, Newbie here. I'm looking to upgrade from my omni CG-4 mount to a reliable GoTo. I can't spend a ton of money this time out so I'm looking for the best value. Here's my question. Is the difference between the EQ6 and the HEQ5 mainly payload limit? What are the other differences? I'm currently working with a Williams Redcat 51, so it's a light scope. I'll probably be upgrading to a cooled camera with a filter wheel. I'm sure I'm leaving out needed information, so let me have it. Thanks in advance.