Ouch. The SL-1200MK2 is an awesome piece of equipment. This is just really shitty news. The fact that I've put off picking one up has finally bit me.
EDIT: So apparently Gizmodo got it wrong, and it's only the SL-1200MK6 model that is being discontinued (appended at the end of the link above). In other news, I hear that, three years ago, Christine O'Donnell did not have sex with an SL-1200MK2. (Everyone knows that Gizmodo and Gawker are sister publications, right? )
I don't know. I guess it depends on what people are expecting. If I know that they play all the same songs at one tour, then obviously I'm only going to go to one show. But with a group that you've mentioned, I'd consider going to more than one show.