I bought a Juki TL98Q eight years ago and I love my machine. I've never had tension issues or thread/needle breaks. I do thoroughly clean/oil my machine frequently and change the needle often to keep it happy. It sews a wonderful stitch and was user friendly for me as a person who didn't come from a sewing background and just wanted to learn to make quilts. I like the thread cutter, needle down button and knee lift. It is a heavy machine and so my DH made a cabinet just it so I don't have to move it around.
I hope to add another Juki to my sewing room. I've looked on Craigslist to see if I can get a used second machine. I have only seen two Juki's and they were priced at what I paid for mine when it was new.