Thanks for the thoughts, everyone. We're on the road and I've brought my old Elna Diva along, thinking I'll either have it serviced and make it my RV machine or trade it towards a newer machine.
I'd considered the Jem series, but I found I don't want a 3/4 machine and I do want a 7mm stitch width. I'm also wanting to sew heavier things like totes, outdoor tablecloths, etc. which is why the 6600 got added to the mix (love the Accufeed on my 7700).
Michelle