The Westwind is roomy, i am not sure about the range, specially on the I, as far as speed I guess is not bad if you fly Citations!
Just kidding, we have the Lear, and for our line of work is great. Fast, great range and almost enough room for what you need to carry. I did Cyeg to FLL (2200NM) in 5.2 and still landed with one hour of fuel, don`t think many other planes can do that!
The worse i did was a 375lbs guy, it took 4 firefighters to get the guy in, and after that i just said 300LBS is the max!.
Later
Sk3