I can't say how you'd like the 6500 compared to the 6600, bc I have the 6600 and I have the 6260 quilters companion.
If I had a shot at a 6500 and it was a good deal and I didn't think I would be getting the same shot at another model, I'd go for it.
The Janomes are great in my book.
Husvarnas and Berninas are out of my price range, but I don't think I'll ever really miss them. I'm quite content...at least for now, lol! :XD: