BTW, even the G280 is now a contender on our runway - a little miracle if one considers the runway eating performance of its ancester, the G200...
The G280 is an amazing aircraft. Certainly look at it. The cabin is the quietest Gulfstream have produced to this day, massive 1980 lb hold, vaccum toilet, wide cabin etc.
With the 3.6 software update, approach speeds and landing distances are much reduced. Autobrakes work well.
There is a rumor going around that the range will be further increased beyond the present 3600nm (at 0.8M/6 pax IFR)
The legacy 500 is a nice aircraft with a good finish, but it is still not a Gulfstream finish.