Thanks to everyone for your insights. So many things to think about!! I am taking my Bernina back to the shop since I've already paid several weeks ago to have it repaired. Hopefully it is something simple. I am planning to look at the new Babylock Meridian while I'm there. I think it's similar to the TOL Solaris but embroidery-only. I'll also look at the Brother machines and the Q20. I wish there was a Janome dealer near me. Everyone that has one of the machines seems to be really, really happy with them.
Since I already have all the machines I need for general sewing, one other thing I thought about was a mid-arm like the HQ Sweet Sixteen or Innova. The Sweet Sixteen is around $6000. If I just bought an embroidery-only and the Sweet Sixteen, that's about the same price I would pay for a TOL machine. Decisions...decisions...