Thank you for the explanation on the intermarriage between companies and their machines. Had no idea that there were so many twins out there! Definitely had no idea that Singer buys the Janome 6500 and then makes it their own. Of course when I stopped at the Joann's near my house, they didn't have that model. This is all very helpful info and opens up my search just a bit more. Hopefully I can test a Janome 6500, as well as other machines, tomorrow. And if I like a particular machine with a twin, like the 6500, then that gives me a possible option in the Singer, which can be found at a really good price point right now. Which then possibly gives me some bargaining chips with a dealer. Excited to try more machines tomorrow!