PAY4 340-350 tas at fl280-310...lowest fuel burn i have seen is 77gph total at fl390 and 285 tas there...

Cheyenne 2 is a good bird that is faster than a king air 90 but smaller inside.

I see controller has a 400ls for sale for 659k and needs props...but if you are part 91...tbo is only a suggestion...the problem is dowty props have a year limit.