I have the Sapphire 830 and it is a great machine.
It is 2 yrs old now and no troubles with it.
Love the 10 inch throat, so much easier to push the quilt thru.
It has all the bells and whistles you want like stay stitch, needle down, and the foot pops up automatic so turns are easy.
It is a real work horse.
The only thing it dosnt do is embroidery. You need the 850 model for that.
I paid 11 hundred for it when it first came out, must be a lot cheaper now.
Wish it had a stitch regulator but Burnina has that all tied up and at a cost that you could buy a long arm for.