If you are looking at the JR 662 and 6102, I would recommend the 6102. It is the newest of the 2 and it has some new features that look great. I have a 662 and wish it was the 6102. I don't think the cost is much different between the two. One thing to look at, and it may not even pertain to what you are looking for, is the trainer switch. If you plan to do any training or be trained, the trainer button on the 662 can be very hard to operate as the instructor. We can attribute at least one crash of my trainer to this button. It doesn't take much movement of your thumb to turn it on and off. I like the lever set up on my 8103 much better. Like I said, it might not pertain to you, but just wanted you to know.