I've seen an embroidery machine creating away while the owner was using her other machine for sewing another project. She has a business embroidering towels and such. I thought it was a grand setup, but I'm sure pricey. Good luck making your decision...make a pros and cons list to help you decide and don't forget to go with your "gut" feeling!
I'm a Janome girl, but I'd love to have a Bernina. Used one in a class and it just hums along! but I'm happy with the Janome.