Look, I've had the 6600 and I have the 7700. The 6600 is just fine and all, but remember too there is no free arm on the 6600, it's really heavy, as is the 7700, but the 6600 isn't that much cheaper that I would get that instead of the 7700. Always get a little more of a machine than you need. I didn't have any luck with my 6600 at all, it ate the fabric all the time when piecing and was a pain in the butt, I traded it in in 8 months for the 7700 and have been happy ever since. I paid full price for my 7700 when it first came out $3,000 with no extras at all, and it was well worth it.