I have both a Pfaff 7570 and a Babylock Espire. While I like my Pfaff a lot, I LOVE my Espire, LOVE it. I have more machines then I need, having a vintage Singer and a vintage 1917 Franklin (both work well)and also a BabyLock Elure serger. But if I had to chose just one machine it would be my Espire, no doubt. I love BabyLock so I'm sure the Quest would also be a good choice.