I too have both of these machines. I can't say enough good things about them.
I use the 2010 for the most part for FMQ, but is also great for piecing. I would
recommend these to anybody who is thinking about them. The 2010 has a bigger
throat space that the 600, but they both have their pros. The 2010 is just a straight
stitch machine and then I go to the 600 for fany stitches etc. I love them both.