I'm not familiar w/the Berninas other then just looking them over before. I did search for you and here are some opinions. Don't know if this helps you or not, but, you can go to:
http://forums.marthapullen.com/read....28012&t=228012
go to:
http://newsgroups.derkeiler.com/Arch.../msg00495.html
Here's a sewing machine reviewer at:
http://www.sewingmachinereviewer.com/bernina-830.html (great site if you want to look up your machine here too)
There are many more out there. I searched 'opinions of the Bernina 830' and that is how I found the above sites. Keep us posted on your homework. What did I learn??That first site is one to go back and check out:))Skeat who hasand loves the Janome 6600...the 10,000 is the embrod. machine in that line