Pace,
Do you have an iPhone? Get X Plane 10. A stunningly realistic flight simulator, with multiple aircraft to choose from.
I've had a lot of fun whizzing around the Austrian Alps at 700 kts low-level in an F22. It certainly concentrates the mind and sharpens your reflexes. There is also a combat option, which is fairly trivial with an AIM-9 but very challenging using guns. I've learned the hard way, many times, about target fixation at low-level!
Back to real life, 250 kts at 500' is pretty exciting for a spam-can pilot and in NZ, if you have a co-operative ATC, you can indulge in what is known euphemistically as a "handling display".
so its mainly about the fuel bill
YBB,
Yes, but at 1000 litres per hour, you still need deep pockets!