I have to say, for $2 million, if the choice is N51DM or a new Cirrus Vision Jet, I'd go for N51DM. I just read Flying's report on the Cirrus, and other than the big, beautiful windows, I'm not impressed.
The 1000 will go higher, just as fast, farther, much larger cabin, much larger baggage, similar avionics, on the same fuel burn. And all in, the 1000 would cost the same or slightly less to operate (although the Cirrus does have warranty, so that might help a bit for the first year).