If this is posted elsewhere, please point me to the data.

The Lancair site says a piston IV-P will do 330 mph (~286 KTAS) at FL240.
I'd be interested in what speed and fuel-flow you guys see at sustainable
power settings at various altitudes.

Most of you flying LOP?  I'm going to the APS class this Friday in Ada.

How much speed do you lose equipping with the thermal or TKS icing products?

Although probably beyond my budget, I'd also be interested in similar data
for turbine-powered IVPs.

My typical flight is 720 nm Oklahoma City to Phoenix, MEA 13000',
prevailing westerlies, 1-2 people and 50 lb stuff.  The Mooney M20J does
great on non-stop range and economy, but I'm evaluating options for going
a lot faster, and preferably with at least inadvertent ice equipment.
Currently thinking Mooney Rocket, P-Baron, IV, IVP...?  Thoughts on
appropriate planes would be welcomed.

Craig