Janome Jem 760 is a great machine and very lightweight. That is what I use for classes now, I think it has 50 or 60 stitches and only weighs about 11-12 pounds. Love it!
I used to have a Brother cs6000i that I loved except for the fact the needle was left homing and I kept breaking needles when I forgot I had a straight stitch foot on. I understand the next model up was center homing. If the cs6000i had been center homing, I would never had gotten rid of it, because it had tons of stitches and weighed 11 pounds.