I started with a 9" machine (Elna 7200) on a B-Line Studio quilt frame and was very happy with it for 5 years. I added a PC Quilter & Max Throat to it and had lots of fun digitizing my own designs. Max Throat partially automates the take up roller making a 9" machine into a 16" machine.
While surfing ebay one day, I found a super bargain on a Voyager 17 with a ProFlex frame so that's what I use now but I still have everything from my original setup. I have dreams about building my own studio where I can set both systems up and have PC Quilter doing one while I do the other.
B-Line Studio w/PCQ & Max
Voyager 17 SLR on SuperQuilter ProFlex frame