There have been problems with early models of the New 830. Mainly computer problems with mother boards and such, some bobbin problems, and problems with the parts to fix them being unavailable. Most of the problematic machines are very early production models and I believe that Bernina has the bugs worked out now.
It really would depend on whether you could use all of the capability that it has to offer. Most owners love the new 830 and rave about it.
It is quite expensive and you can spend less money for a Bernina that has almost the same capability. Bernina has some specials going on the Artista 6 and 7 series right now, with some added value packages.
We own 2 Bernina's and wouldn't purchase anything else but I don't think we would buy an 830 because of the price. However I said that before we purchased our 440QEE and if I had to purchase again I'd spend the money and get another one.