I have a Janome 7700, and I love it. It uses any kind of thread and has a large harp. I used to have a 4800 Janome, not made anymore, so I didn't have too much to learn with the new machine. I have had the 7700 for about a year, and have not had any trouble with it. I can't comment on a Bernina since I have never sewn on one, but I don't think it would offer me anything that I don't have on my Janome. The shop where I bought it offers unlimited classes as long as you need them and repair service if you need it. A close repair service is worth a lot IMHO. Good luck on your search and buy what makes you happy. Oh, one other thing--when I bought the machine financing was free for 12 months (I think that was the length of time offered) and I have seen offers on other machines for longer periods of time. I think that is a good selling point. Ask about that when you make a decision if you are interested in that.
Sue