With that kind of income; Python or FDL, if you can make it work your way; but Python has to be your best option. Only issue, are you gaining flight time, combat time, because a Python can be just a big target, if you don't know how to fly it. The i-pod is a very good option, fully kitted for less than 15 million, good fun to fly, better shields than the King.
Thinking about the flying time thing, your 50 million, must be undermining, hush my mouth. Python.