I ordered Vegas but the download is super slow, only 120k.
Here's pics my current favorite add on, at least until the RealAir FSX spitfire comes out. The FSX version spifire comes with both Griffon and Merlin engine variants, so that should be awesome.
The amount of power these engines make is insane, considering the low rpm. For the Griffon to make 2050 hp at 2750 rpm it needs to crank out around 4,000 ft-lb of torque.
The P-40's Allison engine only manages about 2000 ft-lb, and the P-51 Racer must be making around 6,000.