CPTRICO
If range is what you are after I would seriously consider the S2. It is like a Citation 2 on steroids with an extra 1000 ibs of fuel.
Fuel burn at 39000 is down to 400 per side and fitted with the 5 wing it is a very underrated aircraft.
The later ones (late 90s) may not be new generation but they will get the job done for what you want.
If not cough up the $3.6 million and buy a CJ2
Pace