I have a 6600, a Juki HZL600, a Bernina Activa and an old Elna Carina. I use them each for different things--just me. I piece and quilt on the 6600 and I love it. In fact, I'm quilting a baby quilt tomorrow (got it all pin-basted today) and I'm looking forward to it! If I had to downscale to just one machine, the 6600 would win.