I have a Brother 620. It has six needles. I have really enjoyed this machine. There is a newer model- the PR 1000. It has 10 needles and stitches like a dream. I have several friends that have the Brother Quattro and they love their machine. I have seen the Bernina 830 used at the dealer where I do business. It does great work.
Good luck. You are going to have lots of fun.