I have the original Jazz. Love it! Purely a mechanical machine with choice of 28 stitches. 12 inch throat to handle the "big" projects. If I had known the Jazz II was coming out within a year of my purchase, I would have waited (needle up/down, etc. is soooo very nice to have). Only drawback to the machine is that it weights upwards of 25 pounds and I can't move it.
You won't go wrong with the Jazz II. Have you test driven it yet? Try to do so before you buy. I also believe Baby Lock is having a sale now, so check their website for prices. My dealer (Nashua Sew n Vac) honors the Baby Lock sale prices.
Good luck and enjoy your new machine.