I race in Minnesota with a Predator with a OS 46FX and it goes 120 MPH with a 8.75x8.75 APC pylon prop. I use Hitec 225 servos and a 555 receiver.
The Predator has had lots of opinions from flyers, both good and bad. But hey, for the price, it a good choose for cheap speed.
One problem to mention is the tail incidence. They always seem to be on the negitive side. meaning the leading edge of the tail comes out a little low, so you end up having to use all your down trim to fly level. If you search through the Pylonworld forum there's a procedure to check V-tail incidence.
here's a pic of my red Predator, good luck
http://www.rcuniverse.com/showthread...77&forumid=111]