I don't know the other machines, but I loved my 6600.
It was my first "good" machine and what got me seriously piecing .... and FMQing!
Here's my story .................
I outgrew the 6600, wanting more space for the quilting aspect.
Otherwise I loved it.
I lusted for the sitdown HQ-S16 but just could not justify the $$ for a quilting only machine.
I decided on the Bernina 820 ... bigger throat and BSR.
Basically the same $, but it would sew as well as quilt.
Seemed like a more prudent investment!!
Great machine ... but guess what?
I soon realized that while it has a bigger throat, there wasn't more height to allow for more bulk.
Strange enough, no one ever points that out ... always talk about the bigger throat.
And that is not the total solution.
I kept lusting for the S16 and ....... yes, a couple years later I bought the S16 (as well)!!!!!!!!!
In hindsight ....... the 6600 did everything I wanted/needed it to do except the quilting.
And would still do everything today and probably forever.
My better decision would have been to buy the S16 straight up and kept the 6600.
I would have had more $$ for fabric!!!
No regrets ... I made the best decision at the time, for what I knew.
Just sharing my story, in case it helps you ... or others .... making similar decisions!
All I can say, is to think it through ... and do your research!
Last edited by QuiltE; 04-07-2018 at 11:43 AM.