I'm perfectly happy with my Bernina 440QE, but it is 6+years old, so maybe I would get whatever is newest in the Bernina line.
I'm also very happy with my 26" Innova, but if I can dream then I would get another Innova (maybe 30"?) with lightning stitch and AutoPilot and some of the others bells and whistles that I didn't get the first time around.
For vintage machines, I would like a black Singer 301 with the long bed.
It's fun to dream. I don't need any of those things.