When I was researching machines 2 years ago, the sapphire was on my list. What I read in several reviews was to buy one that ends in a 5 instead of 0. The 930 was the first generation of sapphires, which had issues that they worked out with the second generation, ie. 935. I didn't buy a Viking, so that's all I can say, but just be sure to get a machine you love, and can get serviced.